Atomic Structure And The Periodic Table

Question 1

Smallest part of an element

Answer 1

Atom

Question 2

How many different elements

Answer 2

100

Question 3

Mixtures

Answer 3

Two or more elements or compounds

Can be separated by physical processes

Question 4

Filtration

Answer 4

Separates soluble solids from insoluble

Question 5

Crystallisation

Answer 5

Obtain a soluble solid from a solution

Question 6

Distillation

Answer 6

Different boiling points

Question 7

Chromatography

Answer 7

Separate different soluble coloured components

Question 8

Thomson

Answer 8

1898

Electrons
Negative
Surrounded by a sea of positive charge

Plum pudding

Question 9

Geiger and marsden experiment

Answer 9

Pg 10

Question 10

Rutherford

Answer 10

Positive charge atom in centre nucleus

Nuclear model

Question 11

Bohr

Answer 11

Electrons orbit

Question 12

Chadwick

Answer 12

Evidence of neutrons in the nucleus

Question 13

Later experiments

Answer 13

Nucleus= positive charge

Positive charge particles= protons

Question 14

Subatomic particle

Answer 14

Proton
Neutron
Electron

Question 15

Atoms have no charge because

Answer 15

Equal number of protons and elections

Question 16

Atomic number

Answer 16

Number of protons

Question 17

Mass number

Answer 17

Sum of protons and neutrons

Question 18

Isotopes

Answer 18

Same number of protons

Different number of neutrons

Question 19

Form positive ions when

Answer 19

Lose electrons

Metal atoms

Question 20

Form negative ions when

Answer 20

Non metal

Gain electrons

Question 21

New land

Answer 21

Arranged elements by atomic weight

Question 22

Mendeleev

Answer 22

Left gaps
Reordered 
Groups
Periods
Atomic number

Question 23

Group 0

Answer 23

Noble gases 
Full outer shell
Very stable
Very un reactive
Boiling points increase down

Question 24

Group 1

Answer 24

Alkali
One electron on outer
Low melting and boiling which decrease going down
More reactive going down

Stored in oil because react with oxygen

Low density

Question 25

Alkali which float

Answer 25

Lithium Sodium Potassium

Question 26

When a metal hydroxide dissolves in water

Answer 26

Alkaline solution is produced

Question 27

Alkali metal and non metal

Answer 27

Form ionic compound

Question 28

Group 7

Answer 28

Non metals Halogens Seven electrons Diatomic React with metals to produce ionic salts More reactive will displace and less reactive

Question 29

Transition metals

Answer 29

Centre of table From coloured compounds Ions with different charges Can be used as catalysts Good conductors of electricity and heat Can be easily bent or hammered into shape