Unit B: Matter and Chemical Changes

Question 1

GAS -> SOLID

Answer 1

Deposition

Question 2

SOLID -> GAS

Answer 2

Sublimation

Question 3

List all 11 Physical Properties of Matter

Answer 3

• Color
• Lustre
• Melting/Freezing Point
• Boiling/Condensating Point
• Hardness
• Crystal Shape
• Density
• Solubility
• Conductivity
• Malleability
• Ductility

Question 4

List all 5 Chemical Properties of Matter

Answer 4

• React with an Acid
• Ability to combust
• React with water
• React with air
• React with heat

Question 5

What happens after a PHYSICAL change?

Answer 5

A substance may look different but the composition (what’s made of) stays the same

Question 6

What happens after a CHEMICAL change?

Answer 6

Some New Substance is formed

Question 7

list 5 Evidence of a chemical change?

Answer 7

1. Change in an unexpected color
2. Change in Odour
3. formation of a new Solid (precipitation)
4. Formation of a new gas (bubbles)
5. Release or Absorb heat
   (Exothermic) or (Endothermic)

Question 8

LIQUID -> GAS

Answer 8

Evaporation

Question 9

GAS -> LIQUID

Answer 9

Condensation

Question 10

SOLID -> LIQUID

Answer 10

Melting

Question 11

LIQUID -> SOLID

Answer 11

Freezing

Question 12

How are PERIODS Aligned?

Answer 12

Horizontally

Question 13

How are GROUPS Aligned?

Answer 13

Vertically

Question 14

What’s Group 1 in the Periodic Table?

Answer 14

Alkali Metals

Question 15

What’s Group 2 in the Periodic Table?

Answer 15

Alkali Earth Metals

Question 16

What’s Group 17 in the Periodic Table?

Answer 16

Halogens

Question 17

What’s Group 18 in the Periodic Table?

Answer 17

Noble Gases

Question 18

How do you find Neutrons?

Answer 18

(Atomic Mass) - (# of Protons)

Question 19

How do you find Protons AND Electrons?

Answer 19

The Atomic # has the same amount of protons and electrons

Question 20

List all 10 Symbol Hazards

Answer 20

• Acute Toxicity
• Flammable
• Oxidizer
• Corrosive
• Irritant
• Health Hazard
• Aquatic Toxicity
• Explosive
• Compressed Gas
• Biohazardous

Question 21

Who organized the Periodic Table?

Answer 21

Dimitri Mendeleev

Question 22

What are the 4 properties of IONIC COMPOUNDS!

Answer 22

1. Solid at room temperature
2. High Melting Point and Boiling Point
3. Good conductor of electricity (when dissolved in water)
4. Distinct crystal shape

Question 23

How do you read a CHEMICAL FORMULA?

Answer 23

Symbols -> What element

Number -> Number of atoms

Question 24

How do you name IONIC COMPOUNDS?

Answer 24

Metal + Non-Metal “ide”

Question 25

How are molecular compounds formed?

Answer 25

Ionic bonds -> exchange e-

Molecular bonds -> exchange e-

Question 26

What are the 4 properties of MOLECULAR COMPOUNDS?

Answer 26

1. Made of non-metals
2. Solid, Liquid, and gas @ room temp
3. Poor Conductors
4. Low Melting Point and Boiling Point

Question 27

How do you name MOLECULAR COMPOUNDS?

Answer 27

Prefix + Non-metal Prefix + Non-metal + ide

Question 28

List the first 5 prefix’s

Answer 28

Mono, Di, Tri, Tetra, Penta

Question 29

What are Reactants and Products

Answer 29

Reactants are the materials at the start of a reaction while Products are the materials at the end of a reaction

Question 30

What are Endothermic Reactions?

Answer 30

Absorbs/Takes in energy

Question 31

What are Exothermic Reactions?

Answer 31

Releases/gives off heat/energy