Science Chemistry Chapter 5 Test

Question 1

What is a Physical Property

Answer 1

a description of a substance that does not involve forming a new substance

Question 2

What is a chemical Property

Answer 2

A description of what a substance does as it changed into one or more new substances

Question 3

What are the 5 signs that a chemical change has taken place

Answer 3

• new colour
• precipitate forms
• heat or cold or light is produced or absorbed
• Bubbles of gas are formed
• The change is difficult to reverse

Question 4

What happens in the oxygen gas test?

Answer 4

• The oxygen relights the splint
• When the burnt out splint gets placed into the tube of oxygen it lights back on fire because oxygen is vital for combustion

Question 5

What happens in the hydrogen gas test?

Answer 5

• A loud pop
• When a lit splint is placed into the tube of hydrogen it creates a lout squeaky pop

Question 6

What happens in the carbon dioxide gas test?

Answer 6

• When carbon dioxide is shaken with or bubbled through limewater the limewater turns milky (cloudy).

Question 7

What is an element

Answer 7

A pure substance that cannot be broken down into smaller substances

Question 8

period vs group

Answer 8

row vs column

Question 9

what number on the periodic table tells you the number of electrons

Answer 9

atomic number

Question 10

Why are atoms electriaclly neutral

Answer 10

The number of protons (positively charged) and electrons (negatively charged) are equal in an atom. Therefore the opposite charges are balanced and thus there is no net charge on the atom

Question 11

What does whims stand for

Answer 11

Workplace hzourdous materials info system

Question 12

what is whims

Answer 12

whims provides Canadian workers with info on the safe use of hazourdous products in there workplace