Unit 2 Section B

Question 0

Characteristic physical properties

Answer 0

Color 
Density 
Odor 
Luster
Malleability 
Ductility

Question 1

Physical properties

Answer 1

Properties that can be determined without altering the chemical makeup of the material

Question 2

Physical changes

Answer 2

Melting
Boiling 
Bending 
Evaporating 
Condensing 
Tearing 
Freezing

Question 3

What happens in a physical change

Answer 3

The material remains the same, although it’s form appears to have changed

Question 4

Chemical properties

Answer 4

Properties that relate to any kind of chemical change a substance undergoes, often determining the substance usefulness

Question 5

What happens in a chemical change

Answer 5

A substance changes into one or more new substances

Question 6

Indications a chemical change has taken place

Answer 6

Formation of a precipitate 
Evolution of gas/solid
Change in temperature 
Change in color
Production of light
Formation of oxide

Question 7

Metals

Answer 7

Have luster
Are malleable 
Are ductile
Conduct heat 
Conduct electricity 
Tend to lose electrons

Question 8

Nonmetallic

Answer 8

Are dull
Are brittle 
Do not conduct heat 
Do not conduct electricity 
Tend to gain electrons

Question 9

Isotopes

Answer 9

Atoms with the same number of protons and different number of neutrons

Question 10

Noble gasses

Answer 10

They are unreactive and are in the rightmost column

Question 11

The total mass of an atom is determined by what

Answer 11

Protons and electrons

Question 12

A.P.E

Answer 12

Atomic Number
Protons
Electrons

Question 13

Pure metals have a high luster

Answer 13

Physical

Question 14

The surfaces of some metals become dull when exposed to air

Answer 14

Chemical

Question 15

Milk turns sour if left out in room temperature too long

Answer 15

Chemical

Question 16

Diamonds are hard enough to be used as a coating for drill bits

Answer 16

Physical

Question 17

Metals are typically ductile

Answer 17

Physical

Question 18

Leavened bread dough increases in volume if it is allowed to rise before baking

Answer 18

Chemical

Question 19

Nitrogen gas, which is a relatively non reactive element at room temperature can form nitrogen oxides at the high temperature of an operating automobile engine

Answer 19

Chemical

Question 20

Unreactive argon gas, rather than air, is used to fill many light bulbs to prevent the metal filament wire inside the bulb from being destroyed through oxidation

Answer 20

Chemical

Question 21

Generally, metals are better conductors of heat and electricity than are nonmetals

Answer 21

Physical