The inside story

Question 1

Democritus

Answer 1

All matter is made up of tiny i destructible atoms called atoms.

Question 2

Dalton

Answer 2

• atoms of same element are alike
• atoms cant be divided
• atoms are combined in simple whole number ratios

Question 3

Thomson

Answer 3

Atoms contain electrons

Question 4

Rutherford

Answer 4

• empty space, dense nucleus containing protons

- once electron loses charge it spirals into nucleus

Question 5

Bohr

Answer 5

Electrons could move from one level to another by gaining or losing energy

Question 6

Chadwick

Answer 6

• nucleus contained neutrons and and protons

- neutrons had no charge

Question 7

Protons

Answer 7

• positive charge

- in nucleus

Question 8

Neutrons

Answer 8

• neutral

- in nucleus

Question 9

Electrons

Answer 9

• negative charge

- in shells around nucleus

Question 10

Electron shell capacity

Answer 10

1st shell- 2 electrons

2nd shell- 8 electrons

Question 11

Atomic mass

Answer 11

Bottom

Question 12

Atomic number

Answer 12

Top

Question 13

PEN

Answer 13

Protons = atomic number
Electrons = protons 
neutrons = mass number - protons

Question 14

Groups

Answer 14

Down

Question 15

Period

Answer 15

Across

Question 16

Atomic number trend

Answer 16

Increases across

Increases down

Question 17

Atomic mass trend

Answer 17

Increases across

Increases down

Question 18

Metallic character trend

Answer 18

Decreases across

Increases down

Question 19

Atomic radius trend

Answer 19

Decreases across

Increases down

Question 20

Cation

Answer 20

Lost electrons

Question 21

Anion

Answer 21

Gained electrons

Question 22

Lattice

Answer 22

Oppositely charged ions are attracted to each other and form a lattice.

Question 23

Ionic compound

Answer 23

Metal + non- metal

Give/take other atom’s electrons to make outer shell ‘happy’

Question 24

Naming ionic compounds

Answer 24

• Criss cross method

- non-metal has ‘ide’ at the end

Question 25

What is a polyatomic ion?

Answer 25

A group if atoms which have a charge.

Question 26

Covalent compounds

Answer 26

- non-metal + non-metal | - atoms share electrons to make outer shell 'happy'

Question 27

What is a covalent molecule?

Answer 27

A group if atoms in which the atoms share electrons.

Question 28

Naming covalent compounds

Answer 28

``` 1- mono (only last word) 2- di 3- tri 4- tetra 5- penta Last word ends in ide ```

Question 29

Main contributors to the development of atomic theory?

Answer 29

``` Democritus Dalton Thomson Rutherford Bohr Chadwick ```