Science Practice Test

True or False: Periods increase from bottom to top and groups increase from left to right

True

According to Lewis theory, the number of lone pairs of electrons in the valence orbitals of a phosphorus atom is (K/U) a. 1 b. 2 c. 3 d. 4 e. 5

a. 1

The valence of the dihydrogen phosphite ion (H2PO3) is (K/U) a. 1- b. 2- c. 3- d. 1+ e. none of the above

a. 1-

A metallic element M reacts with oxygen to form an oxide with the formula M2O3. The formula of the corresponding chloride of the metal will be (K/U) a. MCl3 b. MCl c. MCl2 d. M2Cl e. M2Cl2

a. MCl3

Why does atomic radius decrease from left to right in a period? (K/U) a. Nuclear charge increases from left to right in a period. b. Nuclear charge decreases from left to right in a period. c. The number of energy levels increases from left to right in a period. d. The number of energy levels decreases from left to right in a period. e. The number of electrons decreases from left to right in a period.

a. Nuclear charge increases from left to right in a period.

Why does ionization energy increase from left to right in a period? (K/U) a. Nuclear charge increases from left to right in a period. b. Nuclear charge decreases from left to right in a period. c. The number of energy levels increases from left to right in a period. d. The number of energy levels decreases from left to right in a period. e. The number of electrons decreases from left to right in a period.

a. Nuclear charge increases from left to right in a period.

Multivalent metals (K/U) a. can form more than one ion, each with its own charge b. can exist in several different crystalline forms c. appear only in the representative metal groups d. contain more than one populated energy level e. form an ion whose charge is 2+ or greater

a. can form more than one ion, each with its own charge

The particle that has the smallest mass is the a. electron b. proton c. neutron d. nucleus e. ion

a. electron

The IUPAC name for SO3(g) is (Com) a. sulfur trioxide b. sulfur(II) oxide c. sulfur oxide d. sulfur oxate e. monosulfur trioxide

a. sulfur trioxide

The substance NH3 is a very important industrial chemical. It is used directly as a fertilizer and is also used to produce many other useful chemicals. The IUPAC name of this substance is (Com) a. hydrogen nitride b. ammonia c. hydrogen peroxide d. octane e. ammonium

b. ammonia

The IUPAC name for P2I4(s) is (Com) a. phosphorus iodide b. diphosphorus tetraiodide c. tetraphosphorus diiodide d. phosphorus pentaiodide e. dipotassium

b. diphosphorus tetraiodide

The atomic number of an element is defined as the a. number of neutrons in the nucleus b. number of protons in the nucleus c. number of electrons in the nucleus d. number of protons and neutrons in the nucleus e. electron to proton ratio

b. number of protons in the nucleus

When elements are arranged in order of increasing atomic mass, their chemical properties repeat at regular intervals. This statement is the definition of (K/U) a. atomic mass b. periodic law d. law of constant composition e. law of conservation of mass

b. periodic law

Isotopes with unstable nuclei are also referred to as (K/U) a. nucleoisotopes b. radioisotopes c. isotopic radiation d. radiation e. beta isotopes

b. radioisotopes

What is the formula for copper(II) nitrite? (Com) a. Cu2(NO3)(s) b. Cu(NO3)2(s) c. Cu(NO2)2(s) d. Cu2(NO2)(s) e. Cu(NO3)(s)

c. Cu(NO2)2(s)

Hydroselenic acid is a very toxic substance. Its chemical formula is (Com) a. HSe(aq) b. H2SeO2(aq) c. H2Se(aq) d. H2SeO3(aq) e. H2SeO4(aq)

c. H2Se(aq)

Which of the following would have the highest electron affinity? (K/U) a. potassium b. helium c. fluorine d. oxygen e. carbon

c. fluorine

The IUPAC name for HNO2(aq) is (Com) a. aqueous hydrogen nitrate b. aqueous hydrogen nitrite c. nitrous acid d. nitric acid e. sulfuric acid

c. nitrous acid

Electron affinity increases as you go from left to right on the periodic table because a. atomic radius decreases b. ionization energy decreases c. of the periodic law d. all of the above e. none of the above

c. of the periodic law

When both electrons that make up a bond are provided by the same atom, the bond is called a _____ _______ bond

coordinate covalent bond

The formula for carbon tetrachloride is (Com) a. C1Cl4(l) b. C4Cl4(l) c. C1Cl(l) d. CCl4(l) e. C4Cl1(l)

d. CCl4(l)

In which of the following pairs of ions do both names end in "ate"? (K/U) a. ClO3-, ClO2- b. NO3-, NO2- c. CO32-, SO3- d. CO32-, SO42- e. SO32--, MnO4-

d. CO32-, SO42-

What is the formula for cadmium oxide? (Com) a. CdO2(s) b. Cd2O2(s) c. Cd2O(s) d. Cd1O2(s) e. CdO(s)

d. Cd1O2(s)

Which of the following matches of group number and common name is incorrect? (K/U) a. Group 7 - transition metals b. Group 2 - alkali earth metals c. Group 17 - halogens d. Group 2 - actinides e. Group 18 - noble gases

d. Group 2, actinides

The person given credit for developing the first modern periodic table is a. Dalton b. Democritus c. Thomson d. Mendeleev e. Chadwick

d. Mendeleev

Why does electron affinity increase from bottom to top in a chemical family? (K/U) a. Nuclear charge increases from bottom to top in a chemical family. b. Nuclear charge decreases from bottom to top in a chemical family. c. The number of energy levels increases from bottom to top in a chemical family. d. The number of energy levels decreases from bottom to top in a chemical family. e. The number of electrons increases from bottom to top in a chemical family.

d. The number of energy levels decreases from bottom to top in a chemical family.

If the classical name of an acidic substance has the ending "...ic acid", then the formula for the "per....ic acid" of the same family is obtained by (K/U) a. removing two oxygen atoms b. removing all of the oxygen atoms c. subtracting one hydrogen atom d. adding one oxygen atom e. subtracting one oxygen atom

d. adding one oxygen atom

Atomic or ionic radius depends on (K/U) a. nuclear charge b. number of populated energy levels c. number of valence electrons d. all of the above e. none of the above

d. all of the above

Which of the following is a practical use of radioisotopes? (M/C) a. determining the age of old objects b. medical diagnosis c. production of electricity d. all of the above e. none of the above

d. all of the above

The IUPAC name for Fe2O3(s) is (Com) a. iron(II) oxide b. iron trioxide c. iron oxide d. iron(III) oxide e. ferric oxide

d. iron(III) oxide

Molecules that contain only two atoms are called ____/_____

diatomic/binary

Which of the following elements requires the least amount of energy to remove an electron from an atom to form an ion? a. O b. He c. K d. H e. Fr

e. Fr

According to present theory, which of the following chemical formulas represents a pure substance containing covalent bonds? (K/U) a. NaCl b. NiF2 c. PbO2 d. BaO e. SO3

e. SO3

Which one of the following formulas is incorrect? (K/U) a. Cu2O b. NaOH c. CO d. Ba(HCO3)2 e. ZnCl3

e. ZnCl3

A metalloid in Period 3 is (K/U) a. scandium b. aluminum c. germanium d. phosphorus e. silicon

e. silicon

Two atoms are isotopes if they have a. different atomic numbers b. the same mass number, but different atomic numbers c. the same number of protons and neutrons d. the same number of electrons, but a different number of neutrons e. the same atomic number, but a different mass number

e. the same atomic number, but a different mass number

Substances that form solutions that conduct electricity are called

electrolytes

Forces that bond atoms and ions together within a compound are called _____________ forces

intramolecular forces

A bond that is somewhere between an ionic bond and a covalent bond is called a ______ bond

molecular bond (compound)

Electrons in the outermost energy level of an atom or molecule are called ______ electrons

valence electrons