Exam 1

Question 1

Atom

Answer 1

The smallest unit of division for matter

Question 2

Atomic number

Answer 2

Number of protons in nucleus

Question 3

Atomic weight

Answer 3

Average mass of atom (amu)

Question 4

Barometer

Answer 4

Measures atmospheric pressure

Question 5

Bohr

Answer 5

Around a positive nucleus, electrons can change orbitals only by absorbing or releasing energy

Question 6

Boiling point

Answer 6

The temp at which vapor pressure of a liquid is equal to the atmospheric pressure

Question 7

Chemical

Answer 7

Substances studied in chemistry

Question 8

Chemistry

Answer 8

Identification and study of substances and matter

Question 9

Compound

Answer 9

A pure substance consisting of two or more types of atoms

Question 10

Dalton

Answer 10

Atomic theory - all matter is composed of atoms (smallest) - all atoms of the same element have the same chemical properties - atoms of two different elements can combine to form a new substance

Question 11

Density

Answer 11

Mass/volume

Question 12

Diatomic

Answer 12

Molecules containing 2 atoms

Question 13

Electron

Answer 13

Subatomic particle with a negative charge

Question 14

Element

Answer 14

(Homo) pure one kind of atom 👩‍❤️‍👩

Question 15

Family

Answer 15

AKA group

Vertical column of elements with similar properties

Question 16

Formula weight

Answer 16

Labeled amu

Sum of atomic weights of atoms in a compound

Question 17

Heteroatomic

Answer 17

Molecules consisting of two or more types of atoms

Question 18

Heterogeneous

Answer 18

Matter with properties not uniform throughout substance

Question 19

Homogeneous

Answer 19

Same properties throughout sample of matter

Question 20

Hypothesis

Answer 20

Proposed statement without actual proof to explain facts

Question 21

Ionization

Answer 21

Energy required to remove an electron

Question 22

Isotope

Answer 22

Same atomic number/same element

New mass number/different amount of neutrons

Question 23

Kelvin

Answer 23

SI base unit of temperature

Question 24

Kilogram

Answer 24

SI base unit of mass

Question 25

Liter

Answer 25

SI base unit of volume

Question 26

Mass

Answer 26

Measure of the amount of matter in an object

Question 27

Metal

Answer 27

Left 2/3 of periodic table

Question 28

Fundamental unit of length in metric system

Answer 28

Meter

Question 29

Determined charge of the electron

Answer 29

Millikan

Question 30

Physical blend of matter can be separated

Answer 30

Mixture

Question 31

Relating to molecules

Answer 31

Molecular

Question 32

Smallest particle of a pure substance

Answer 32

Molecule

Question 33

Subatomic particle with neutral charge

Answer 33

Neutron

Question 34

Right 1/3 of periodic table

Answer 34

Nonmetal

Question 35

Center of atoms Contains protons and neutrons Is most of an atom's mass

Answer 35

Nucleus

Question 36

Horizontal row of elements

Answer 36

Period

Question 37

Observed without changing the composition of matter

Answer 37

Physical

Question 38

Subatomic particle | Positive charge

Answer 38

Proton

Question 39

Concentration of an atoms mass @ nucleus

Answer 39

Rutherford

Question 40

Second

Answer 40

SI unit of time

Question 41

Solution

Answer 41

Homogeneous mixture of 2 or more substances

Question 42

Thomson

Answer 42

Cathode ray tube Plum pudding model Positive and negative charges

Question 43

Valence

Answer 43

Highest energy level

Question 44

Weight

Answer 44

Measure of gravitational force acting on an object

Question 45

Electron affinity

Answer 45

Attraction of atom or an additional electron

Question 46

First ionization

Answer 46

Energy needed to remove most loosely held electron

Question 47

When they have a ________ ions have a stable, filled outer electron level.

Answer 47

Noble gas configuration

Question 48

Shielding effect

Answer 48

Increased distance of the outer electrons from the nucleus | Ionization decreases going down a column

Question 49

Low ionization is a characteristic of...

Answer 49

Metals

Question 50

Ionization energy does what across periods??

Answer 50

Increase

Question 51

High ionization...

Answer 51

Nonmetals and noble gases

Question 52

The attraction of atoms for a shared electron

Answer 52

Electronegativity

Question 53

The distance from the nucleus to the outermost electron

Answer 53

Atomic radius