Grade 9 Chem Review

Question 0

Metals have no lustre

Answer 0

False. They are shiny

Question 1

Most elements can be classified as metal or

Answer 1

Nonmetal

Question 2

An atom makes up everything

Answer 2

True

Question 3

The central part of an atom

Answer 3

Nucleus

Question 4

Protons have a ________ charge

Answer 4

Positive

Question 5

Neutrons have a __________ charge

Answer 5

Neutral or no

Question 6

A liquid turning to solid is a _________ change

Answer 6

Physical

Question 7

A nail rusting is a ________ change

Answer 7

Chemical

Question 8

The colour of an element is a __________ property

Answer 8

Physical

Question 9

The formation of a new substance is a __________ change

Answer 9

Chemical

Question 10

Electrons are _________ charged particles

Answer 10

Negatively

Question 11

The atomic mass equals the _______ + _______

Answer 11

Protons and neutrons

Question 12

The atomic number equals the ___________ number

Answer 12

Proton

Question 13

The valency is the charge on an atom due to the electrons on the outer shell

Answer 13

True

Question 14

A row is also known as a

Answer 14

Period

Question 15

A column is also known as a family or

Answer 15

Group

Question 16

The most reactive groups are groups 1 and 7

Answer 16

True

Question 17

The least reactive group is group number?

Answer 17

8

Question 18

Group 7 is known as the _________

Answer 18

Halogens

Question 19

An element that acts as a metal and nonmetal is known as a _________________

Answer 19

Metalloid

Question 20

The electron shells are filled from the inner ring by 2, 8, ?

Answer 20

2,8,8

Question 21

The elements on the left side of the periodic table are mostly

Answer 21

Metals

Question 22

The elements on the right side of the periodic table are mostly

Answer 22

Non metals

Question 23

Transition metals are found mainly in the middle section of the periodic table

Answer 23

True

Question 24

Electron mass is so small it is not part of the atomic mass of an element

Answer 24

True

Question 25

Metals form ___________ ions with non metals

Answer 25

Positive

Question 26

Non metals form _____________ ions with metals

Answer 26

Negative

Question 27

When atoms gain electrons they become _____________ charged

Answer 27

More negatively

Question 28

When atoms lose electrons they become ____________ charged

Answer 28

Positively

Question 29

Ionic bonds form between two metals

Answer 29

False. Metals and non metals