2.1 molecules

Question 1

atoms

Answer 1

submicroscopic molecules that are building blocks of matter

Question 2

molecules

Answer 2

atoms bonded in a specific geometric arrangement

Question 3

properties of a molecule:

Answer 3

1. types of atoms bonded
2. number of each atom
3. type of bond

Question 4

matter can be classified according to:

Answer 4

1. state
2. composition

Question 5

solid

Answer 5

definite shape and volume

Question 6

crystalline pattern

Answer 6

atoms/molecules with long-range, repeating order

Question 7

amorphous pattern

Answer 7

atoms/molecules with no order

Question 8

liquid

Answer 8

definite volume, indefinite shape

Question 9

gases

Answer 9

indefinite shape and volume

Question 10

compressibility

Answer 10

able to squeeze particles close together

Question 11

pure substance

Answer 11

made of one component

Question 12

2 types of pure substances:

Answer 12

1. elements
2. compounds

Question 13

elements

Answer 13

cannot be broken down into smaller substances

Question 14

compounds

Answer 14

composed of 2 or more types of atoms

Question 15

heterogeneous

Answer 15

composition varies throughout

Question 16

homogeneous

Answer 16

same composition

Question 17

decanting

Answer 17

separating a mixture by pouring it into separate containers

Question 18

distillation

Answer 18

heating a mixture so the most volatile liquid can be re-condensed and collected

Question 19

filtration

Answer 19

filtering to separate