Chapter 1,2,3- Chemistry (Completion)
Rounded to four significant figures, 1.245 633 501 x 10^8 is ____________________.
1.246 x 10^8
Two conversion factors that could be used together to change kilometers to millimeters would be ____________________ and ____________________.
1000 m/1 km, 1000 mm/m
The result of dividing 10^7 by 10^-3 is ____________________.
10^10
Using a metric ruler with 1-mm divisions, you find the sides of a rectangular piece of plywood are 3.54 cm and 4.85 cm. You calculate that the area is 17.1690 cm2. To the correct number of significant figures, the result should be expressed as ____________________.
17.2 cm2
An analytical balance can measure mass to the nearest 1/10 000 of a gram, 0.0001 g. In scientific notation, the accuracy of the balance would be expressed as ____________________.
1x 10^-4
The number of significant figures in the measurement 210 cm is ____________________.
2
Divide 5.7 m by 2 m. The quotient is correctly reported as ____________________.
3
The number of significant figures in the measured value 0.003 20 g is ____________________.
3
When 64.4 is divided by 2.00, the correct number of significant figures in the result is ____________________.
3
The average distance between Earth and the moon is 386 000 km. Expressed in scientific notation, this distance is ____________________.
3.86 x 10^5
The sum of 314.53 km and 32 km is correctly expressed as ____________________.
347 km
The speed of light is 300 000 km/s. In scientific notation, this speed is ____________________.
3x 10^5 km/s
Avogadro's number has a value (to three significant figures) of ____________________.
6.02 x 10^23
Another method of writing the nickel isotope,58^/28^Ni , is ____________________.
Nickel-58
A well-tested explanation of observations is a(n) ____________________.
Theory
The conversion factor used to change cg to g would be ____________________.
1 g/100 g
An alloy such as bronze is an example of a(n) ____________________ mixture.
Homogeneous
A measurement that closely agrees with accepted values is said to be ____________________.
Accurate
Use the periodic table to write the name for the element that has the symbol Al. ____________________
Aluminium
Use the periodic table to write the symbol for the element argon. _______________
Ar
The number of protons in the nucleus of an atom is called the ____________________.
Atomic number
Use the periodic table to write the name for the element that has the symbol Bi. ____________________
Bismuth
An apple turning brown after being cut is an example of a ____________________ change.
Chemical
Any substance with a definite composition is a(n) ____________________.
Chemical
Use the periodic table to write the symbol for the element chlorine. ____________________
Cl
Orbitals are sometimes called electron ____________________ because they do not have hard boundaries.
Clouds
Iron and sulfur, when heated, form an iron sulfide that has different properties from either iron or sulfur. This iron sulfide is an example of a(n) ____________________.
Compound
The fact that mass and energy cannot be created or destroyed is the fundamental concept of the theme of ____________________.
Conservation
The statement that mass cannot be created or destroyed in ordinary chemical and physical changes is called the law of _________________________.
Conservation of mass
When a candle burns, the total mass of the candle and the oxygen equals the total mass of the gases and ashes produced. This reaction illustrates the law of ____________________.
Conservation of mass
The statement that a chemical compound always contains the same elements in exactly the same proportions is called the law of _________________________.
Definite proportions
A subatomic particle that has no charge and is found in the nucleus is a(n) ____________________.
Neutron
In using the scientific method, after analyzing results, the next step is to ____________________.
Draw conclusions
A subatomic particle that has a negative electric change is a(n) ____________________.
Electron
The _________________________ of an atom is the arrangement of its electrons.
Electron configuration
The two types of matter that are pure substances are ____________________ and ____________________.
Elements, Compounds
Light can be thought of as a stream of particles, the ____________________ of which is determined by the light's frequency.
Energy
The capacity to do work or produce light is known as ____________________.
Energy
A state in which an atom has more energy than it does in its ground state is called a(n) ____________________.
Excited state
A chemical reaction that releases energy is a(n) ____________________ reaction.
Exothermic
The wavelength of electromagnetic radiation is inversely proportional to its ____________________.
Frequency
Use the periodic table to write the symbol for the element helium. ___________________
He
Gravel is an example of a(n) ____________________ mixture.
Heterogeneous
Some iron and some sulfur are mixed together then gently heated. When the result is cooled, the iron can be separated from the sulfur by using a magnet. This result is a(n) _________________________.
Heterogeneous Mixture
The statement that for an atom in the ground state, the number of unpaired electrons is the maximum possible and these unpaired electrons have the same spin is known as ____________________ rule.
Hund's
Use the periodic table to write the symbol for the element iodine. ____________________
I
An atom that has the same number of protons as other atoms of the same element but has a different number of neutrons is called a(n) ____________________.
Isotope
The energy that matter has because of its motion is called ____________________.
Kinetic Energy
A statement or mathematical expression that reliably describes a behavior of the natural world is a(n) ____________________.
Law
A sample of matter can be poured from container to container. It takes the shape of its container but only takes up a certain volume. Based on this information, the sample is in the ____________________ state.
Liquid
The particles in a ____________________ are able to slide past each other.
Liquid
Use the periodic table to write the name for the element that has the symbol Mg. ____________________
Magnesium
The sum of the numbers of protons and neutrons of the nucleus of an atom is called the ____________________.
Mass number
The mass in grams of 1 mol of a substance is the substance's ____________________.
Molar mass.
The SI base unit used to measure the amount of a substance whose number of particles is the same as the number of particles in 12 g of carbon-12 is called the ____________________.
Mole
The quantity of heat transferred during a temperature change depends on the ____________________ and mass of the material and the ____________________ of the temperature change.
Nature, size
Use the periodic table to write the symbol for the element neon. _____________
Ne
An atom's central region, which is made up of protons and neutrons, is the ____________________.
Nucleus
Specific heat is the amount of heat energy needed to raise the temperature of ____________________ of a substance 1 K.
One gram
A region in an atom where there is a high probability of finding electrons is called a(n) ____________________.
Orbital
The statement that two particles of a certain class cannot be in the exact same energy state is known as the ____________________ principle.
Pauli Exclusion Principle
The melting of butter is a ____________________ change because it does not produce any new substances.
Physical
When examining a mineral, hardness and color are two of the properties used for identification. Hardness and color are examples of ____________________ properties.
Physical
If some measurements agree closely with each other but differ widely from the actual value, these measurements are ____________________ but not ____________________.
Precise, accurate
A subatomic particle that has a positive charge and that is found in the nucleus of an atom is a(n) ____________________.
Proton
A number that specifies a property of an orbital is called a(n) ____________________.
Quantum Number
The oxygen in air causes iron to rust. Iron and oxygen are ____________________ in this process, and rust is a(n) ____________________.
Reactants, Products
Use the periodic table to write the symbol for the element tin. ____________________
Sn
All of the frequencies or wavelengths of electromagnetic radiation make up the electromagnetic ____________________.
Spectrum
A measure of the average kinetic energy of the particles in a sample of matter is its ____________________.
Temperature
