Science T3 Y9

Question 1

Ammonium

Answer 1

NH4(+)

Question 2

Nitrate

Answer 2

NO3(-)

Question 3

Carbonate

Answer 3

CO3(2-)

Question 4

Sulfate

Answer 4

SO4(2-)

Question 5

Hydroxide

Answer 5

OH(-)

Question 6

Phosphate

Answer 6

PO4(3-)

Question 7

Hydrogen carbonate

Answer 7

HCO3(-)

Question 8

Hydrogen Sulfate

Answer 8

HSO4(-)

Question 9

Heterogeneous Mixture

Answer 9

A mixture with a non-uniform composition

Question 10

Homogeneous Mixture

Answer 10

A mixture with a uniform composition

Question 11

Solute

Answer 11

The minor component in a solution

Question 12

Solvent

Answer 12

The major component in a solution

Question 13

Proton

Answer 13

A particle with a positive charge that is in the nucleus of an atom

Question 14

Electron

Answer 14

A negatively charged subatomic particle

Question 15

Nucleus

Answer 15

The positively charged centre of an atom and contains most of its mass

Question 16

Neutron

Answer 16

A subatomic particle found in the nucleus of every atom except that of simple hydrogen

Question 17

Atom

Answer 17

An extremely small particle of matter that retains its identity during chemical reactions (cannot be broken down naturally)

Question 18

Element

Answer 18

A substance that cannot be broken down into simpler components by any non-nuclear chemical reaction (made of atoms with same number of protons in nucleus)

Question 19

Ion

Answer 19

A atom or molecules that is not neutral

Question 20

Molecule

Answer 20

A group of two or more atoms held together by attractive forces known as chemical bonds

Question 21

Compound

Answer 21

A substance formed from two or more elements chemically united in fixed proportions

Question 22

Law of the Conservation of Mass

Answer 22

The mass of the reactants must equal the mass of the products in a chemical reaction

Question 23

Physical change

Answer 23

A change in a substance that does not change what the substance is

Question 24

Chemical change

Answer 24

A change in which a substance is changed into a different substance

Question 25

Chemical property

Answer 25

A characteristic of a substance that can only be observed by changing it into a different substance

Question 26

Physical property

Answer 26

A characteristic of a substance that can be observed or measured without changing the identity of the substance

Question 27

Synthesis

Answer 27

A + B = AB

Question 28

Decomposition

Answer 28

AB = A + B

Question 29

Combustion

Answer 29

Hydrocarbon + Oxygen = Water + Carbon Dioxide

Question 30

Single Displacement

Answer 30

AB + C = AC + B

Question 31

Precipitation/Double Displacement

Answer 31

AB + CD = AC + BD

Question 32

Acid

Answer 32

Any substance that have a sour Taste and a hydrogen ion, turn litmus red, have pH numbers less than 7

Question 33

Base

Answer 33

Any substance capable of reacting with an acid to form a salt and water

Question 34

Alkaline

Answer 34

Any substance that contains hydroxide ions, feels soapy, turns litmus blue, has a pH number higher than 7, reacts with acids to make a salt and water

Question 35

Acid + Base

Answer 35

Acid + Base = Salt + Water

Question 36

Acid + Metal

Answer 36

Acid + Metal = Salt + Hydrogen

Question 37

Acid + Metal Carbonate

Answer 37

Acid + Metal Carbonate = Salt + Water + Carbon Dioxide

Question 38

Substances that are always soluble (NAG SAG)

Answer 38

Nitrates
Acetates
Group 1

Sulfates
Ammonium
Group 17

Question 39

Soluble substances’ exceptions (PMS & Castro Bear)

Answer 39

Pb (lead)
Mercury (Hg)
Silver (Ag)

Ca
Sr
Ba

Question 40

Number of moles in substance = ?

Answer 40

Mass of a substance in grams/Grams per mole for substance

Question 41

Molar Weight

Answer 41

Grams per mole for a substance (found for an element by looking for atomic mass)