Yr 10 Chemistry

Question 1

Protons

Answer 1

Large with positive charge

Found in nucleus

Question 2

Electrons

Answer 2

Small with negative charge

Found around the nucleus

Question 3

Neutrons

Answer 3

Large with no charge

Found in nucleus

Question 4

Name of protons, electrons and neutrons

Answer 4

Sub atomic particles

Question 5

Neutrons and protons

Answer 5

Mass of the cell

Electrons take up space

Question 6

Atomic number

Answer 6

Atom is equal to the number of protons

Question 7

Mass number

Answer 7

Atomic is equal to the number of protons added to the number of neutrons

Question 8

Isotopes

Answer 8

An atom with the same number of protons but a different number of neutrons
Same atomic number but different mass number

Question 9

How many electrons in a shell

Answer 9

2, 8,8, 2

Question 10

Another name for outer shell

Answer 10

Valence

Question 11

Valence electrons involve

Answer 11

Chemical reaction

Question 12

Shells are also know as

Answer 12

Energy levels

Question 13

Rows across are

Answer 13

Periods

Question 14

Rows down

Answer 14

Group

Question 15

Group 1

Answer 15

Alkali metals

Soft grey colour

Question 16

Group 2

Answer 16

Alkaline earth metals

Soft very reactive

Question 17

Group 17

Answer 17

Halogens

Bright coloured

Question 18

Group 18

Answer 18

Noble
Unreactive
Full outer shell (8)

Question 19

Rest of groups

Answer 19

Main group elements

Question 20

How to determine elements period and group

Answer 20

Group= last number of electrons in last shell
Period= how many shells

Question 21

Metallic

Answer 21

Resembling metals
Cation occur to form a positive charged ion when they lose electrons in the outer shell
Metals are good conductor of heat, electricity and are shiny

Question 22

Ionic compound

Answer 22

Cation and Anion
When a metal gives away a valence electron to become positive charged and a non metals gains valence electron to become negative
Consist of metal and non metal

Question 23

Cation

Answer 23

Positively charged ion

Question 24

Anion

Answer 24

Negatively charged ion

Question 25

Covalent compound

Answer 25

Formed when non metals are chemically combined. Each atom shares electrons with others, these shared electrons form the “glue” rear holds the atom together Use gases e.g fluorine, oxygen, nitrogen, hydrogen Lewis diagram

Question 26

Properties of metals

Answer 26

Good conductor of heat and electricity Lustrous Malleable and ductile

Question 27

Properties of non metals

Answer 27

Dull brittle can’t be shaped at room temp | Poor conductors of heat and electricity

Question 28

Properties of metalloids

Answer 28

Can behave like metals or non metals | Called semi conductors

Question 29

Properties of transition metals

Answer 29

Similar properties to the main group of metals

Question 30

How do u know if a chemical reaction has occurred

Answer 30

Colour, heat precipitation

Question 31

Difference between chemical and physical change in a chemical reaction

Answer 31

Physical states of matter- ice cube melts | Chemical- zinc + copper nitrate = zinc nitrate + copper gives 2 new solutions

Question 32

Law of conversation of mass

Answer 32

The mass of reactant will always equal the mass of products Reactants left Products right

Question 33

Precipitation reactions

Answer 33

When 2 solutions mix together and creates 2 new solutions one can be insoluble

Question 34

Combination reactions

Answer 34

2 chemical substances combine to for, new chemical product

Question 35

Decomposition reaction

Answer 35

Breaks down | One reacting substance and several products formed

Question 36

Combustion reactions

Answer 36

Occur when chemical substance burns with oxygen Produces heat, light or sound energy = exothermic reaction Always has hydrocarbon in it

Question 37

Redox reaction

Answer 37

Many chemical reactions are either completely or partially moved from one atom or ion to another.(electron transfer) Rust Corrosion

Question 38

Metal displacement reactions

Answer 38

Removing one element and replacing it with another element | Zinc + copper nitrate = zinc nitrate + copper

Question 39

Neutralisation reactions

Answer 39

When an acid reacts with a metal hydroxide(base) = salt and water

Question 40

Hcl

Answer 40

Hydrochloride acid

Question 41

HSO | Electro valence

Answer 41

H2SO4 | Sulfuric acid

Question 42

CH

Answer 42

CH4 methane gas