Chem Test Chapter 2

Front 1

a number that defines a particular element

Back 1

atomic number

Front 2

particle of radiant energy

Back 2

photon

Front 3

a substance that cannot be broken down by chemical reaction

Back 3

element

Front 4

a region in the center of the atom containing protons and neutrons

Back 4

nucleus

Front 5

atoms of the same element that have a different number of neutrons

Back 5

isotope

Front 6

an atom that bears a charge as a result of gaining or losing electrons

Back 6

ion

Front 7

this particle makes up the atomic number in an atom

Back 7

proton

Front 8

the number of protons and neutrons in a nucleus

Back 8

mass number

Front 9

superscript in atomic notation equals what?

Back 9

mass number

Front 10

subscript in atomic notation equals what?

Back 10

atomic number

Front 11

the ____ of an element is the weighted average mass of all naturally occurring isotopes

Back 11

atomic mass

Front 12

refers to the distance the light wave travels in one cycle

Back 12

wavelength

Front 13

refers to the number of wave cycles completed in each second

Back 13

frequency

Front 14

refers to radiant energy that is visible

Back 14

light

Front 15

visible spectrum consists of what figures?

Back 15

400nm to 700nm

Front 16

acronym for energy in light spectrum

Back 16

ROY G BiV

Front 17

results when light is passed through a spectrometer, can help identify atoms

Back 17

emission line spectrum

Front 18

what are the energy sublevels

Back 18

s p d f

Front 19

conclusion that it is impossible to measure both the location and momentum of a small particle simultaneously

Back 19

uncertainty principle

Front 20

region of high probability for finding an electron of given energy

Back 20

orbital

Front 21

states that the properties of elements recur in repeating pattern according to increasing mass number

Back 21

periodic law

Front 22

vertical column of the periodic table

Back 22

group

Front 23

horizontal row in the periodic table is called a

Back 23

period

Front 24

these elements are found in the B groups in the middle of the periodic table

Back 24

transition elements

Front 25

these elements are found main portion of the period table

Back 25

inner transition elements

Front 26

the first period of the inner transition elements

Back 26

lanthanides

Front 27

the second period of the inner transition elements

Back 27

actinides

Front 28

the first group of the periodic table

Back 28

alkali metals

Front 29

the second group of the periodic table

Back 29

alkaline earth metals

Front 30

the 17th group of elements is known as the

Back 30

Halogen Gases

Front 31

the 18th group of the periodic table is known as the

Back 31

noble gases

Front 32

outermost electrons are called the

Back 32

valence electrons

Front 33

_______ shows the symbol of an element surrounded by its valence electrons

Back 33

electron dot formula

Front 34

solid, liquid, and gas are

Back 34

physical states

Front 35

a direct change from a solid to a gas

Back 35

sublimation

Front 36

a direct change from a gas to a solid

Back 36

deposition

Front 37

the change from a liquid to a gas

Back 37

vaporization

Front 38

the change from a solid to a liquid

Back 38

melting

Front 39

the change from a gas to a liquid

Back 39

condensation

Front 40

a ___ mixture can be separated by physical methods

Back 40

heterogeneous

Front 41

the properties for a ______ mixture are constant for a given sample

Back 41

homogenous

Front 42

a homogenous mixture of two or more metals

Back 42

alloy

Front 43

matter that has definite composition and constant properties

Back 43

substance

Front 44

has predictable properties but can be broken down into elements by ordinary chemical reactions

Back 44

compound

Front 45

a substance that cannot be broken down further by a chemical reaction

Back 45

element

Front 46

ability to be drawn into fine wire

Back 46

ductility

Front 47

ability to be pounded into thin sheets

Back 47

malleablility

Front 48

principle that a compound aways contains the same mass ratio of elements

Back 48

law of definite composition/constant proportion

Front 49

a single particle comprised of two or more nonmetal atoms

Back 49

molecule

Front 50

refers to those characteristics of a pure substance that we can observe without changing the composition of the substance

Back 50

physical property

Front 51

describes the chemical reactions that a pure substance has with other substances

Back 51

chemical property

Front 52

T/F chemical change always results in the formation of a new substance

Back 52

True

Front 53

In ___ change, the chemical composition of a sample does not change

Back 53

physical

Front 54

the law that states that matter cannot be created or destroyed during a chemical reaction

Back 54

law of the conservation of mass

Front 55

energy that matter possesses as a result of its position or composition

Back 55

potential energy

Front 56

energy as a result of motion

Back 56

Kinetic energy

Front 57

name the 6 forms of energy

Back 57

heat, light, chemical electrical, mechanical, nuclear

Front 58

the composition of a compound is given by it's ____ ____

Back 58

chemical formula

Front 59

the law that states that the total mass and energy is constant

Back 59

law of conservation of mass and energy