Chemistry Final

The density of pure diamond is 3.5 g/cm3. What is the volume of a diamond with a mass of 0.25 g? a) 0.071 cm3 b) 0.875 cm3 c) 3.75 cm3 d) 14 cm3

a) 0.071 cm3

How many moles of LiF are present in 10.37 g? a) 0.3998 mol b) 1.333 mol c) 2.500 mol d) 36.32 mol

a) 0.3998 mol

The number of valence electrons in Group 1 elements is a) 1. b) 2. c) 8. d) equal to the period number.

a) 1.

A prospector finds 39.39 g of pure gold (atomic mass 196.9665 amu). She has a) 1.204 ´ 10^23 atoms of Au. b) 2.308 ´ 10^23 atoms of Au. c) 4.306 ´ 10^23 atoms of Au. d) 6.022 ´ 10^23 atoms of Au.

a) 1.204 ´ 10^23 atoms of Au.

Chlorine has atomic number 17 and mass number 35. It has a) 17 protons, 17 electrons, and 18 neutrons. b) 35 protons, 35 electrons, and 17 neutrons. c) 17 protons, 17 electrons, and 52 neutrons. d) 18 protons, 18 electrons, and 17 neutrons.

a) 17 protons, 17 electrons, and 18 neutrons.

What is the electron configuration for nitrogen, atomic number 7? a) 1s2 2s2 2p3 b) 1s2 2s3 2p2 c) 1s2 2s3 2p1 d) 1s2 2s2 2p2 3s1

a) 1s2 2s2 2p3

If 8 electrons completely fill a main energy level, what is n? a) 2 b) 4 c) 8 d) 32

a) 2

The mass of 5.000 mol of cesium (atomic mass 132.9 amu) is a) 664.5 g. b) 132.9 g. c) 6.022 ´ 10^23 g. d) 5.000 g.

a) 664.5 g.

Bromine, atomic number 35, belongs to Group 17. How many electrons does bromine have in its outermost energy level? (valence electrons) a) 7 b) 17 c) 18 d) 35

a) 7

The number of valence electrons in Group 17 elements is a) 7. b) 8. c) 17. d) equal to the period number.

a) 7.

Strontium's highest occupied energy level is 5s2. To what group does strontium belong? a) Group 2 b) Group 5 c) Group 6 d) Group 8

a) Group 2

The idea of arranging the elements in the periodic table according to their chemical and physical properties is attributed to a) Mendeleev. b) Moseley. c) Bohr. d) Ramsay.

a) Mendeleev.

The person whose work led to a periodic table based on increasing atomic number was a) Moseley. b) Mendeleev. c) Rutherford. d) Cannizzaro.

a) Moseley.

What is the formula for the compound formed by lead(II) ions and chromate ions? a) PbCrO4 b) Pb2CrO4 c) Pb2(CrO4)3 d) Pb(CrO4)2

a) PbCrO4

Refer to the figure above. Potassium and bromine belong to a) Period 4. b) Group 4. c) Period 1. d) Group 1.

a) Period 4.

Whose series of experiments identified the nucleus of the atom? a) Rutherford b) Dalton c) Chadwick d) Bohr

a) Rutherford

Rutherford's experiments led him to conclude that atoms contain massive central regions that have a) a positive charge. b) a negative charge. c) no charge. d) both protons and electrons.

a) a positive charge.

The graph of two variables that are directly proportional to one another is a) a straight line. b) an ellipse. c) a parabola. d) a hyperbola.

a) a straight line.

Which of the following is an example of a homogeneous mixture? a) air b) orange juice c) raw milk d) marble

a) air

The elements in Group 1 are also known as the a) alkali metals. b) rare-earth series. c) Period 1 elements. d) actinide series.

a) alkali metals.

A spherical electron cloud surrounding an atomic nucleus would best represent a) an s orbital. b) a p x orbital. c) a combination of px and py orbitals. d) a combination of an s and a px orbital.

a) an s orbital.

One-half the distance between the nuclei of identical atoms that are bonded together is called the a) atomic radius. b) atomic diameter. c) atomic volume. d) electron cloud.

a) atomic radius.

Because most particles fired at metal foil passed straight through, Rutherford concluded that a) atoms were mostly empty space. b) atoms contained no charged particles. c) electrons formed the nucleus. d) atoms were indivisible.

a) atoms were mostly empty space.

A nonmetal is usually a) brittle. b) malleable. c) a good conductor. d) used to make jewelry.

a) brittle.

In a row in the periodic table, as the atomic number increases, the atomic radius generally a) decreases. b) remains constant. c) increases. d) becomes immeasurable

a) decreases.

According to the law of conservation of mass, when sodium, hydrogen, and oxygen react to form a compound, the mass of the compound is ____ the sum of the masses of the individual elements. a) equal to b) greater than c) less than d) either greater than or less than

a) equal to

As it travels through space, electromagnetic radiation a) exhibits wavelike behavior. b) loses energy. c) varies in speed. d) releases photons.

a) exhibits wavelike behavior.

As you move down Group 14 in the periodic table from carbon through lead, atomic radii a) generally increase. b) generally decrease. c) do not change. d) vary unpredictably.

a) generally increase.

Across a period in the periodic table, atomic radii a) gradually decrease. b) gradually decrease, then sharply increase. c) gradually increase. d) gradually increase, then sharply decrease.

a) gradually decrease.

If electrons in an atom have the lowest possible energies, the atom is in the a) ground state. b) inert state. c) excited state. d) radiation-emitting state.

a) ground state.

If a mixture is uniform in composition, it is said to be a) homogeneous. b) chemically bonded. c) heterogeneous. d) a compound.

a) homogeneous.

According to the Bohr model of the atom, the single electron of a hydrogen atom circles the nucleus a) in specific, allowed orbits. b) in one fixed orbit at all times. c) at any of an infinite number of distances, depending on its energy. d) counterclockwise.

a) in specific, allowed orbits.

Name the compound Fe(NO3)2. a) iron(II) nitrate b) iron(II) nitrite c) iron(III) nitrate d) iron(III) nitride

a) iron(II) nitrate

Which of these symbols represents a unit of volume? a) mL b) mg c) mm d) cm

a) mL

All of the following are examples of units except a) mass. b) kilometer. c) gram. d) ounce.

a) mass.

Elements in which the d-sublevel is being filled have the properties of a) metals. b) nonmetals. c) metalloids. d) gases.

a) metals.

The average atomic mass of an element is the average of the atomic masses of its a) naturally occurring isotopes. b) two most abundant isotopes. c) radioactive isotopes. d) artificial isotopes.

a) naturally occurring isotopes.

Name the compound Ni(ClO3)2. a) nickel(II) chlorate b) nickel(II) chloride c) nickel(II) chlorite d) nickel(II) peroxide

a) nickel(II) chlorate

A quantum of electromagnetic energy is called a(n) a) photon. b) electron. c) excited atom. d) orbital.

a) photon.

A positively charged particle with mass 1.673 ´ 10^-24 g is a(n) a) proton. b) neutron. c) electron. d) positron.

a) proton.

Which block in the periodic table contains the alkali metals? a) s b) p c) d d) f

a) s

The lattice energy is a measure of the a) strength of an ionic bond. b) strength of a metallic bond. c) strength of a covalent bond. d) net charge on a crystal.

a) strength of an ionic bond.

What are the elements with atomic numbers from 58 to 71 called? a) the lanthanides b) the noble gases c) the actinides d) the alkali metals

a) the lanthanides

An atom is a) the smallest unit of matter that maintains its chemical identity. b) the smallest unit of a compound. c) always made of carbon. d) smaller than an electron.

a) the smallest unit of matter that maintains its chemical identity.

The molar mass of MgI2 is a) the sum of the masses of 1 mol of Mg and 2 mol of I. b) the sum of the masses of 1 mol of Mg and 1 mol of I. c) the sum of the masses of 1 atom of Mg and 2 atoms of I. d) the sum of the masses of 1 atom of Mg and 1 atom of I.

a) the sum of the masses of 1 mol of Mg and 2 mol of I.

Which of these measurements has been expressed to three significant figures? a) 0.052 g b) 0.202 g c) 3.065 g d) 500 g

b) 0.202 g

Phosphorus-33 (atomic number 15) contains a) 33 protons. b) 18 neutrons. c) 33 neutrons. d) 18 protons.

b) 18 neutrons.

A sample of gold has a mass of 96.5 g and a volume of 5.00 cm3. The density of gold is a) 0.0518 g/cm3. b) 19.3 g/cm3. c) 101.5 g/cm3. d) 483 g/cm3.

b) 19.3 g/cm3.

How many atoms of fluorine are present in a formula unit of strontium fluoride, SrF2? a) 1 b) 2 c) 4 d) 5

b) 2

0.25 g is equivalent to a) 250 kg. b) 250 mg. c) 0.025 mg. d) 0.025 kg.

b) 250 mg.

nitrogen has 5 valence electrons. How many more electrons does nitrogen need to satisfy the octet rule? a) 1 b) 3 c) 5 d) 8

b) 3

The number of significant figures in the measured value 0.032 0 g is a) 2. b) 3. c) 4. d) 5.

b) 3.

The number of significant figures in the measurement 0.000 305 kg is a) 2. b) 3. c) 6. d) 7.

b) 3.

When 64.4 is divided by 2.00, the correct number of significant figures in the result is a) 1. b) 3. c) 4. d) 6.

b) 3.

The mass of 2.0 mol of oxygen atoms (atomic mass 16.00 amu) is a) 16 g. b) 32 g. c) 48 g. d) 64 g.

b) 32 g.

A sample of tin (atomic mass 118.71 amu) contains 3.01 ´ 10^23 atoms. The mass of the sample is a) 3.01 g. b) 59.3 g. c) 72.6 g. d) 11 g.

b) 59.3 g.

How is the measurement 0.000 065 cm written in scientific notation? a) 65 ´ 10^-6 cm b) 6.5 ´ 10^-5 cm c) 6.5 ´ 10^-6 cm d) 6.5 ´ 10^-4 cm

b) 6.5 ´ 10^-5 cm

For the f sublevel, the number of orbitals is a) 5. b) 7. c) 9. d) 18.

b) 7.

What is the mass of 8.05 x 1023 formula units of NaCl? a) 1.34 g b) 78.1 g c) 1.38 x 1022 g d) 4.70 x 1025 g

b) 78.1 g

Calcium, atomic number 20, has the electron configuration [Ar] 4s2. In what period is calcium? a) Period 2 b) Period 4 c) Period 8 d) Period 20

b) Period 4

A compound is a) a pure substance that cannot be broken down into simpler, stable substances. b) a substance, made of two or more atoms that are chemically bonded, that can be broken down into simpler, stable substances. c) the smallest unit of matter that maintains its chemical identity. d) any substance, whether it is chemically bonded or not.

b) a substance, made of two or more atoms that are chemically bonded, that can be broken down into simpler, stable substances.

The deflection of cathode rays in Thomson's experiments was evidence of the ____ nature of electrons. a) wave b) charged c) particle d) spinning

b) charged

The density of an object is calculated by a) multiplying its mass times its volume. b) dividing its mass by its volume. c) dividing its volume by its mass. d) adding its mass to its volume.

b) dividing its mass by its volume.

The change of an atom from an excited state to the ground state always requires a) absorption of energy. b) emission of electromagnetic radiation. c) release of visible light. d) an increase in electron energy.

b) emission of electromagnetic radiation.

For an electron in an atom to change from the ground state to an excited state, a) energy must be released. b) energy must be absorbed. c) radiation must be emitted. d) the electron must make a transition from a higher to a lower energy level.

b) energy must be absorbed.

The atomic theory proposed by Dalton has been a) totally discarded. b) expanded and modified. c) accepted unchanged to the present day. d) found to be plagiarized.

b) expanded and modified.

If a mixture is not uniform throughout, it is called a) homogeneous. b) heterogeneous. c) chemically bonded. d) a solution.

b) heterogeneous.

Matter includes all of the following except a) air. b) light. c) smoke. d) water vapor.

b) light.

Which of the following is not a property of an ionic compound? a) hard b) malleable c) brittle d) high melting point

b) malleable

Atoms of the same element can differ in a) chemical properties. b) mass number. c) atomic number. d) number of protons and electrons.

b) mass number.

Isotopes are atoms of the same element that have different a) principal chemical properties. b) masses. c) numbers of protons d) numbers of electrons.

b) masses.

The symbol mm represents a) micrometer b) millimeter. c) milliliter. d) meter.

b) millimeter.

A nuclear particle that has about the same mass as a proton, but with no electrical charge, is called a(n) a) nuclide. b) neutron. c) electron. d) isotope.

b) neutron.

Argon, krypton, and xenon are a) alkaline earth metals. b) noble gases. c) actinides. d) lanthanides.

b) noble gases.

Elements to the right side of the periodic table (p-block elements) have properties most associated with a) gases. b) nonmetals. c) metals. d) metalloids.

b) nonmetals.

The periodic law states that the physical and chemical properties of elements are periodic functions of their atomic a) masses. b) numbers. c) radii. d) charges.

b) numbers.

The set of orbitals that are dumbbell shaped and directed along the x, y, and z axes are called a) d orbitals. b) p orbitals. c) f orbitals. d) s orbitals.

b) p orbitals.

These values were recorded as the mass of products when a chemical reaction was carried out three separate times: 8.83 g; 8.84 g; 8.82 g. The mass of products from that reaction is 8.60 g. The values are a) accurate, but not precise. b) precise, but not accurate. c) both accurate and precise. d)neither accurate nor precise

b) precise, but not accurate.

A numerical result is said to have good precision if a) it agrees closely with an accepted value. b) repeated measurements agree closely. c) it has a small number of significant figures. d) it is a large whole number.

b) repeated measurements agree closely.

The product of the frequency and the wavelength of a wave equals the a) number of waves passing a point in a second. b) speed of the wave. c) distance between wave crests. d) time for one full wave to pass.

b) speed of the wave.

The statement that an electron occupies the lowest available energy orbital is a) Hund's rule. b) the Aufbau principle. c) Bohr's law. d) the Pauli exclusion principle.

b) the Aufbau principle.

The principle that states that the physical and chemical properties of the elements are periodic functions of their atomic numbers is a) the periodic table. b) the periodic law. c) the law of properties. d) Mendeleev's law.

b) the periodic law.

A line spectrum is produced when an electron moves from one energy level a) to a higher energy level. b) to a lower energy level. c) into the nucleus. d) to another position in the same sublevel.

b) to a lower energy level.

The distance between two successive peaks on adjacent waves is its a) frequency. b) wavelength. c) quantum number. d) velocity.

b) wavelength.

The measurement 0.035550 g rounded off to two significant figures would be a) 0.03 g. b) 0.35 g. c) 0.036 g. d) 3.5 ´ 102 g.

c) 0.036 g.

How many moles of atoms are in 50.15 g of mercury (atomic mass 200.59 amu)? a) 0.1001 mol b) 0.1504 mol c) 0.2500 mol d) 0.4000 mol

c) 0.2500 mol

What is 1.245 633 501 ´ 108 rounded to four significant figures? a) 1246 b) 1.2456 ´ 10^8 c) 1.246 ´ 10^8 d) 1.246 ´ 10^4

c) 1.246 ´ 10^8

How many minutes are in 1 week? a) 168 min b) 1440 min c) 10 080 min d) 100 800 min

c) 10 080 min

The electron notation for aluminum (atomic number 13) is a) 1s2 2s2 2p3 3s2 3p3 3d1. b) 1s2 2s2 2p6 3s2 2d1. c) 1s2 2s2 2p6 3s2 3p1. d) 1s2 2s2 2p9.

c) 1s2 2s2 2p6 3s2 3p1.

An aluminum isotope consists of 13 protons, 13 electrons, and 14 neutrons. Its mass number is a) 13. b) 14. c) 27. d) 40.

c) 27.

Which of these measurements has been expressed to four significant figures? a) 0.0020 mm b) 0.0402 mm c) 30.00 mm d) 402.10 mm

c) 30.00 mm

How many electrons are needed to completely fill the fourth energy level? a) 8 b) 18 c) 32 d) 40

c) 32

The density of aluminum is 2.70 g/cm3. What is the mass of a solid piece of aluminum with a volume of 1.50 cm3? a) 0.556 g b) 1.80 g c) 4.05 g d) 4.20 g

c) 4.05 g

When 6.02 ´ 1023 is multiplied by 9.1 ´ 10-31, the product is 4.3 ´ 10^-8. 4.3 ´ 10^54. c) 4.3 ´ 10^-7. 4.3 ´ 10^-53.

c) 4.3 ´ 10^-7.

The number of orbitals for the d sublevel is a) 1. b) 3. c) 5. d) 7.

c) 5.

The number of grams equal to 0.5 kg is a) 0.0005. b) 0.005. c) 500. d) 5000.

c) 500.

How would 0.00930 m be expressed in scientific notation? a) 93 ´ 10^-4 m b) 9.3 ´ 10^-4 m c) 9.30 ´ 10^-3 m d) 9.30 ´ 10^-5 m

c) 9.30 ´ 10`-3 m

What is the molar mass of magnesium chloride, MgCl2? a) 46 g/mol b) 59.76 g/mol c) 95.21 g/mol d) 106.35 g/mol

c) 95.21 g/mol

What is the formula for aluminum sulfate? a) AlSO4 b) Al2SO4 c) Al2(SO4)3 d) Al(SO4)3

c) Al2(SO4)3

What is the formula for barium hydroxide? a) BaOH b) BaOH2 c) Ba(OH)2 d) Ba(OH)

c) Ba(OH)2

Molar mass a) is the mass in grams of one mole of a substance. b) is numerically equal to the average atomic mass of the element. c) Both (a) and (b) d) Neither (a) nor (b)

c) Both (a) and (b)

The relationship between the mass m of a material, its volume V, and its density D is a) D = mV. b) D = V/m. c) D = m/V. d) D = m + v.

c) D = m/V.

The principles of atomic theory recognized today were conceived by a) Avogadro. b) Bohr. c) Dalton. d) Rutherford.

c) Dalton.

A mixture is a) a combination of pure substances bonded chemically. b) any substance with a uniform composition. c) a blend of any two or more kinds of matter, as long as each maintains its own unique properties. d) any group of elements that are chemically bonded to one another.

c) a blend of any two or more kinds of matter, as long as each maintains its own unique properties.

The group of soft, silvery, reactive metals, all of which have one electron in an s orbital, is known as the a) alkaline-earth metals. b) transition metals. c) alkali metals. d) metalloids.

c) alkali metals.

A positive ion is known as a(n) a) ionic radius. b) valence electron. c) cation. d) anion

c) cation.

All of the following are steps in the scientific method except a) observing and recording data. b) forming a hypothesis. c) discarding data inconsistent with the hypothesis. d) developing a model based on experimental results.

c) discarding data inconsistent with the hypothesis.

The p orbitals are shaped like a) electrons. b) circles. c) dumbbells. d) spheres.

c) dumbbells.

Most of the volume of an atom is occupied by the a) nucleus. b) nuclides. c) electrons. d) protons.

c) electrons.

An electron for which n = 4 has more ____ than an electron for which n = 2. a) spin b) particle nature c) energy d) wave nature

c) energy

To which block do the actinide elements belong? a) d block b) s block c) f block d) p block

c) f block

Which of the following is an example of a heterogeneous mixture? a) a gold ring b) seawater c) granite d) sucrose

c) granite

The electron in a hydrogen atom has its lowest total energy when the electron is in its a) neutral state. b) excited state. c) ground state. d) quantum state.

c) ground state.

The vertical columns on the periodic table are called a) periods. b) rows. c) groups. d) elements.

c) groups.

The most reactive group of the nonmetals is the a) lanthanides. b) transition elements. c) halogens. d) noble gases.

c) halogens.

The Pauli exclusion principle states that no two electrons in the same atom can a) occupy the same orbital. b) have the same spin quantum numbers. c) have the same set of quantum numbers. d) be at the same main energy level.

c) have the same set of quantum numbers.

The frequency of electromagnetic radiation is measured in waves/second, or a) nanometers. b) quanta. c) hertz. d) joules.

c) hertz.

Because c, the speed of electromagnetic radiation, is a constant, the wavelength of the radiation is a) proportional to its frequency. b) equal to its frequency. c) inversely proportional to its frequency. d) double its frequency.

c) inversely proportional to its frequency.

The total number of protons and neutrons in the nucleus of an atom is its a) atomic number. b) Avogadro number c) mass number. d) average atomic mass.

c) mass number.

Which of the following is not a chemical change? a) rusting b) igniting c) melting d) burning

c) melting

In an ionic compound, a) electrons are shared. b) metals gain electrons and nonmentals lose electrons. c) metals lose electrons and nonmetals gain electrons. d) a nonmetal is bonded to a nonmetal.

c) metals lose electrons and nonmetals gain electrons.

According to Dalton's atomic theory, atoms a) are destroyed in chemical reactions. b) can be divided. c) of each element are identical in size, mass, and other properties. d) of different elements cannot combine

c) of each element are identical in size, mass, and other properties.

A three-dimensional region around a nucleus where an electron may be found is called a(n) a) spectral line. b) electron path. c) orbital. d) orbit.

c) orbital.

Name the compound KClO3. a) potassium chloride b) potassium trioxychlorite c) potassium chlorate d) hypochlorite

c) potassium chlorate

Mendeleev left spaces in his periodic table and predicted the existence of three elements and their a) atomic numbers. b) colors. c) properties. d) radioactivity.

c) properties

As the mass number of an element's isotopes of an element increases, the number of protons a) decreases. b) increases. c) remains the same. d) doubles each time the mass number increases.

c) remains the same.

Visible light, X rays, infrared radiation, and radio waves all have the same a) energy. b) wavelength. c) speed. d) frequency.

c) speed.

The major difference between a 1s orbital and a 2s orbital is that a) 2s orbital can hold more electrons. b) the 2s orbital has a slightly different shape. c) the 2s orbital is at a higher energy level. d) the 1s orbital can have only one electron.

c) the 2s orbital is at a higher energy level.

What are the radioactive elements with atomic numbers from 90 to 103 called? a) the noble gases b) the lanthanides c) the actinides d) the rare-earth elements

c) the actinides

Avogadro's number is a) the maximum number of electrons that all the energy levels can accommodate. b) the number of protons and neutrons that can fit in the shells of the nucleus. c) the number of particles in 1 mole of a pure substance. d) the number of particles in exactly 1 gram of a pure substance.

c) the number of particles in 1 mole of a pure substance.

An atom is electrically neutral because a) neutrons balance the protons and electrons. b) nuclear forces stabilize the charges. c) the numbers of protons and electrons are equal. d) the numbers of protons and neutrons are equal.

c) the numbers of protons and electrons are equal.

Neon-22 contains 12 neutrons. It also contains a) 12 protons. b) 22 protons. c) 22 electrons. d) 10 protons.

d) 10 protons.

What is the molar mass of (NH4)2SO4? a) 114.09 g/mol b) 118.34 g/mol c) 128.06 g/mol d) 132.16 g/mol

d) 132.16 g/mol

If n is the principal quantum number of a main energy level, the number of electrons in that energy level is a) n. b) 2n. c) n^2. d) 2n^2.

d) 2n^2.

Determine the amount of formula units in 1.55 mol of lithium phosphate. a) 2.57 x 10-24 formula units b) 0.0134 formula units c) 6.02 x 1023 formula units d) 9.33 x 1023 formula units

d) 9.33 x 1023 formula units

The mass of a sample containing 3.5 mol of silicon atoms (atomic mass 28.0855 amu) is approximately a) 28 g. b) 35 g. c) 72 g. d) 98 g.

d) 98 g.

What is the formula for the compound formed by calcium ions and chloride ions? a) CaCl b) Ca2Cl c) CaCl3 d) CaCl2

d) CaCl2

The element with electron configuration 1s2 2s2 2p6 3s2 3p2 is a) Mg (Z = 12). b) C (Z = 6). c) S (Z = 16). d) Si (Z = 14).

d) Si (Z = 14).

A measurement that closely agrees with an accepted value is best described as a) precise. b) reproducible. c) significant. d) accurate.

d) accurate.

Name the compound Al2S3. a) aluminum sulfate b) aluminum sulfur c) aluminum(II) sulfate d) aluminum sulfide

d) aluminum sulfide

A negative ion is known as a(n) a) ionic radius. b) valence electron. c) cation. d) anion.

d) anion.

The most characteristic property of the noble gases is that they a) have low boiling points. b) are radioactive. c) are gases at ordinary temperatures. d) are largely unreactive.

d) are largely unreactive.

Mendeleev noticed that properties of elements usually repeated at regular intervals when the elements were arranged in order of increasing a) atomic number. b) density. c) reactivity. d) atomic mass.

d) atomic mass

All atoms of the same element have the same a) atomic mass. b) number of neutrons. c) mass number d) atomic number.

d) atomic number.

Moseley's work led to the realization that elements with similar properties occurred at regular intervals when the elements were arranged in order of increasing a) atomic mass. b) density. c) radioactivity. d) atomic number.

d) atomic number.

Which of the following is not a physical change? a) grinding b) cutting c) boiling d) burning

d) burning

The region outside the nucleus where an electron can most probably be found is the a) electron configuration. b) quantum. c) s sublevel. d) electron cloud.

d) electron cloud.

Experiments with cathode rays led to the discovery of the a) proton. b) nucleus. c) neutron. d) electron.

d) electron.

The element that has the greatest electronegativity is a) oxygen. b) sodium. c) chlorine. d) fluorine.

d) fluorine

A statement that can be tested experimentally is a a) variable. b) model. c) generalization. d) hypothesis.

d) hypothesis.

The energy required to remove an electron from an atom is the atom's a) electron affinity. b) electron energy. c) electronegativity. d) ionization energy.

d) ionization energy.

The symbols for units of length in order from largest to smallest are a) m, cm, mm, km. b) mm, m, cm, km. c) km, mm, cm, m. d) km, m, cm, mm.

d) km, m, cm, mm.

The SI base units for length and time are a) centimeter and second. b) meter and hour. c)centimeter and hour. d) meter and second.

d) meter and second.

The horizontal rows on the periodic table are called a) actinides. b) families. c) elements. d) periods.

d) periods.

If repeated measurements agree closely but differ widely from the accepted value, these measurements are a) neither precise nor accurate. b) accurate, but not precise. c) both precise and accurate. d) precise, but not accurate.

d) precise, but not accurate.

The main energy levels of an atom are indicated by the a) orbital quantum numbers. b) magnetic quantum numbers. c) spin quantum numbers. d) principal quantum numbers.

d) principal quantum numbers.

Elements in a group or column in the periodic table can be expected to have similar a) atomic masses. b) atomic numbers. c) numbers of neutrons. d) properties.

d) properties.

Mendeleev predicted that the spaces in his periodic table represented a) isotopes. b) radioactive elements. c) unstable elements. d) undiscovered elements.

d) undiscovered elements.