Grade 9 chemistry

Question 1

A pure substance can be made up of any number of different kinds of particles (T/F)

Answer 1

False

Question 2

Describing natural gas as being a colourless and stinky gas would describe its physical properties(T/F)

Answer 2

True

Question 3

Matter is anything that has mass and takes up space

Answer 3

True

Question 4

Particles in a solid have more motion than particles in a liquid

Answer 4

False

Question 5

Solutions are uniform mixtures where the substances making up the solution can be distinguished

Answer 5

False

Question 6

The ability for something to burn is a chemical property

Answer 6

True

Question 7

Ductility

Answer 7

ability of a substance to be pulled into a finer strand

Question 8

Each element is given a certain symbol. What is an element symbol?

Answer 8

An abbreviation used for an element that is recognized world wide

Question 9

Person who performed the gold foil experiment and proposed that an atom has a positively charged nucleus

Answer 9

Ernest Rutherford

Question 10

Electron

Answer 10

Negatively charged particle in an atom

Question 11

Proton

Answer 11

Positively charged particle in an atom

Question 12

Neutron

Answer 12

Neutrally charged particle in an atom

Question 13

Which group of elements are almost all solids, good conductors and ductile

Answer 13

Metals

Question 14

Which family of elements are stable and unreactive?

Answer 14

Noble Gases

Question 15

Number of protons in an atom

Answer 15

Atomic number

Question 16

James Chadwick discovered this

Answer 16

Neutron

Question 17

Number of protons and neutrons in an atom’s nucleus

Answer 17

Mass number

Question 18

Name given to the electron in the outer most orbit

Answer 18

Valence

Question 19

Name given to a row in the periodic table

Answer 19

Period

Question 20

What is a mixture

Answer 20

A substance that is made up of at least 2 different variations of particles

Question 21

Qualitative properties

Answer 21

A property that you can’t really measure and does not have a numeric value

Question 22

Quantitative Properties

Answer 22

A property of a substance that is measured and has a numerical value

Question 23

Chemical Properties

Answer 23

A characteristic of a substance that describes its ability to change its composition to produce one or more new substances

Question 24

Physical Properties

Answer 24

A characteristic of a substance that can be determined without changing the composition of that substance

Question 25

Malleability

Answer 25

the ability of substance to be bent, hammered, changed in form

Question 26

Viscosity

Answer 26

the flow rate of a substance, has to do with how thick something is

Question 27

Transparency

Answer 27

how clear a substance is, how much you can see through the substance

Question 28

Metal

Answer 28

A compound that is lustrous, ductile and can conduct heat and electricity, Copper, iron, aluminum

Question 29

Nonmetal

Answer 29

an element, usually a gas or a dull powdery solid that does not conduct heat or electricity, Example oxygen, carbon, sulphur

Question 30

Compound

Answer 30

a pure substance composed of 2 or more different elements that are chemically joined

Question 31

Element

Answer 31

a pure substance that cannot be broken down

Question 32

Number of electrons does an atom have if it has 19 protons | How many neutrons does it have if the mass number is 40,

Answer 32

19 electrons, if mass number is 40 it has 21 neutrons,

Question 33

What are the three subatomic particles?

Answer 33

Proton, neutron and electron

Question 34

What is a cation

Answer 34

A positively charged ion

Question 35

What is an anion

Answer 35

A negatively charged ion

Question 36

Name four scientists that affected the particle theory

Answer 36

Ernest Rutherford, john dalton,JJ Thomson and Niels Bohr

Question 37

How many atoms build up C6 H12 O6

Answer 37

24

Question 38

How are valence electrons different than other electrons

Answer 38

Valence electrons are on the outermost shell

Question 39

What are the three types of elements found in the periodic table? Name and describe 2

Answer 39

Metals, Non-metals and Metalloids