Chapter Two Flash Cards

Question 1

Most of the mass of an atom is in the

Answer 1

Nucleus

Question 2

Most of the volume of an atom is

Answer 2

empty space

Question 3

Nucleus is surrounded by

Answer 3

Electrons

Question 4

Neutral atoms have equal numbers of

Answer 4

protons and electrons

Question 5

Isotope

Answer 5

Type of atom with different masses but chemically indistinguishable to a known element

Question 6

AMU

Answer 6

atomic mass unit

Question 7

Mass number is equal to

Answer 7

protons + electrons

Question 8

For ions, the number of electrons does not equal the number of

Answer 8

protons

Question 9

law of conservation of matter

Answer 9

atoms are not created or destroyed during a chemical process

Question 10

Law of definite proportions

Answer 10

All samples of a pure compound contain the same elements in the same proportion by mass

Question 11

neutrons

Answer 11

uncharged, subatomic particles with a mass approximately the same as that of protons and found in nucleus

Question 12

Mass number =

Answer 12

Atomic Number + neutrons
Protons + neutrons

Question 13

Ion Charge

Answer 13

Protons = Electrons

Question 14

Molecular Formula

Answer 14

indicates the type and number of atoms in a compound

Question 15

Empirical Formula

Answer 15

Indicates the lowest whole number ration of atoms in a compound

Question 16

Metals

Answer 16

Shiny, malleable, conduct heat + electricity

Question 17

Nonmetals

Answer 17

dull, insulate heat + electricity

Question 18

Metalloids

Answer 18

can have properties of metals and/or nonmetals

Question 19

Alkali Metals

Answer 19

Group 1 (except hydrogen)

Question 20

Alkaline Metals

Answer 20

Group 2

Question 21

Pnictogens

Answer 21

Group 15

Question 22

Chalcogens

Answer 22

Group 16

Question 23

Halogens

Answer 23

Group 17

Question 24

Noble Gases

Answer 24

Group 18

Question 25

Group 1 during chemical reactions

Answer 25

lose one electron 1+ charge cation

Question 26

Group 2 during chemical reactions

Answer 26

lose 2 electrons 2+ charge cations

Question 27

Non-Metals Group 17 During Chemical Change

Answer 27

gain one electron 1- charge anion

Question 28

Non-Metals Group 16 During Chemical Change

Answer 28

gain two electrons 2- charge anions

Question 29

Ionic Compound

Answer 29

forms when electrons are transferred through electrostatic attraction

Question 30

Molecular Compound

Answer 30

Forms when electrons are shared