Sophmore

Question 1

Atoms

Answer 1

About 100 kinds

Question 2

Diatomic elements

Answer 2

Hydrogen, oxygen, etc.

Question 3

Compound

Answer 3

Material made up of 2 or more kinds of atoms in constant proportions

Question 4

Pure substances

Answer 4

Formula can be written

Question 5

All else is a…

Answer 5

Mixture

Question 6

Homogeneous

Answer 6

Solution, evenly mixed

Question 7

Heterogenous

Answer 7

Clumpy

Question 8

Physical change

Answer 8

Reversible, no new substances

Question 9

Chemical change

Answer 9

New substance, irreversible

Question 10

Measure of nucleus

Answer 10

10^-15 m (angstrom)

Question 11

Size of atom

Answer 11

10^-10 m(angstrom)

Question 12

Charge of an atom

Answer 12

Protons- electrons

Question 13

Mass of atom

Answer 13

Protons + neutrons

Question 14

A=

Answer 14

Atomic mass

Question 15

Z=

Answer 15

Atomic number

Question 16

Ions

Answer 16

Atoms gain or lose electrons

Question 17

Noble gases

Answer 17

Far right column

Question 18

Alkali metals

Answer 18

Far right column

Question 19

Alkaline earth metals

Answer 19

Column to right of alkali metals

Question 20

Metals tend to lose ions…

Answer 20

Cations

Question 21

Halogens

Answer 21

To the left of noble gases

Question 22

Non metals tend to gain ions…

Answer 22

Anions

Question 23

Metalloids

Answer 23

Boron to polonium

Question 24

Rare earth metals

Answer 24

Bottom outliers

Question 25

Transition metals

Answer 25

Middle elements

Question 26

Element

Answer 26

Material madre up of 1 kind of atom