C3

Question 1

In the early 1800’s how did they categorise the elements?

Answer 1

By physical/chemical properties

Relative Atomic Mass

Question 2

Who had the law of the octaves?

Answer 2

Newlands

Question 3

What was wrong with Newlands table?

Answer 3

His groups contained elements that didn’t have similar properties
He mixed up metals and non metals
He didn’t leave gaps for elements that hadn’t been discovered yet.

Question 4

In 1869 who organised the periodic table?

Answer 4

Dmitri Mendaleev

Question 5

How did Mendaleev order it?

Answer 5

In order of atomic mass

Bu the left gaps in order to keep those with similar properties in the same column

Question 6

Why did Mendaleev leave gaps?

Answer 6

Too allow space for elements that hadn’t been discovered yet

Question 7

Nowadays how are the elements arranged?

Answer 7

By their electronic structure

Question 8

What is group 1?

Answer 8

The alkali metals

Question 9

What happens in group 1?

Answer 9

As you go down -
they become more reactive
have lower melting and boiling points

Question 10

How many electrons do elements in group 1 have?

Answer 10

1

Question 11

If a group 1 metal reaction what does it become?

Answer 11

A positive ion

Question 12

What happens if a group 1 metal reacts with water?

Answer 12

Reacts very vigorously.

Float and move around the surface, fizzing

Question 13

What do group 1 metal reactions produce?

Answer 13

Hydrogen gas

Hydroxides that dissolve in water to give alkaline solutions

Question 14

How do you test if a group 1 metal reaction has occurred?

Answer 14

A lighted splint with indicate this by a ‘squeaky pop’

Question 15

What is group 7?

Answer 15

The halogens

Question 16

What happens in group 7?

Answer 16

As you go down-
They become less reactive
Have higher melting and boiling points

Question 17

What are the halogens?

Answer 17

Non-metals with coloured vapours

Question 18

What colour vapour does fluorine have?

Answer 18

Poisonous yellow gas

fluorine is very reactive

Question 19

What colour vapour does chlorine have?

Answer 19

Poisonous dense green gas

its fairly reactive

Question 20

What colour liquid does bromine have?

Answer 20

Dense, poisonous red-brown volatile liquid

Question 21

What colour vapour does iodine have?

Answer 21

Dark grey, crystalline solid or purple vapour

Question 22

How do elements in group 7 travel around?

Answer 22

They travel in pairs

Question 23

What ions do the halogens form?

Answer 23

negative 1 ion

Question 24

Do the halogens displace eachother?

Answer 24

Yes. More reactive halogens displace less reactive halogens.

Question 25

What are the properties of transition metals?

Answer 25

Good conductors of heat & electricity
Very dense, strong and shiny
Less reactive that group 1
Much denser, stringer and harder than group 1 metals
High melting points

Question 26

What is common about transition metal ions?

Answer 26

Usually they have more than one ion