Unit 2: 2.1

Question 1

• has mass and occupies space

* is made up of atoms

Answer 1

Matter

Question 2

• smallest building blocks
• different atoms represent different elements
• all atoms of the same element are exactly the same
• smallest represnentative part of an element

Answer 2

Atoms

Question 3

Rows are called _____

Answer 3

Periods

Question 4

Columns are called ______ or ______

Answer 4

Groups or families

Question 5

Group 1

Answer 5

Alkali metals

Question 6

Group 2

Answer 6

Alkaline earth metals

Question 7

Group 17

Answer 7

Halogens

Question 8

Group 18

Answer 8

Noble gases

Question 9

Boron family group

Answer 9

Group 13

Question 10

Carbon family group

Answer 10

Group 14

Question 11

Nitrogen group family

Answer 11

Group 15

Question 12

Oxygen family group

Answer 12

Group 16

Question 13

Columns 3 through 12

Answer 13

Transition metals

Question 14

Top row at the bottom

Answer 14

Lanthanoid series

Question 15

Bottom row at the bottom

Answer 15

Actinoid series

Question 16

Different forms of the same element

Answer 16

Allotropes

Question 17

• contain atoms of 2 or more different elements chemically combined
• can be broken down by chemical reactions

Answer 17

Compound

Question 18

Law of Constant Composition

Answer 18

Atoms in a compound always bond together in a specific way

Question 19

Chemical formula

Answer 19

Gives the symbol for each different element present + the subscript indicates how many of each

Question 20

Called pure substances

Answer 20

Elements and compounds

Question 21

Always homogeneous

Answer 21

Elements and compounds