HideShow resource information


The nucleus is present in the centre of an atom

1 of 16

sub atomic particle

A nuetron has a mass of 1 and no charge

2 of 16

different versions of atoms

Atoms that have the same number of protons but a different number of nuetrons is called an isotope

3 of 16


The maximum amout of electrons in each shell has a pattern of 2, 8, 8, 18

4 of 16

Electronic configuration

The electronic configuration in the number of electrons in each shell.
E.G. Potassium has the configuraton 2,8,8,1

5 of 16


The stability of an atom is based on the amount of electrons on the outer shell

6 of 16

Periods and Groups

Groups go along the top and are the amount of electrons on the outer shell
Period go down and are the number of electron shells

7 of 16

John Newland

tried organising the periodic table into laws of octaves

8 of 16


was Russian. he swapped the order of some elements to ensure their properties fitted with others in the same group.

9 of 16


Mendeleev left gaps for elements that had yet to be discovered, and could subsequestly estimate they're properties

10 of 16


His version of the Periodic table became popular because new elements were discovered and they fitted in the gaps he'd left

11 of 16


A few years after the Periodic Table was published, Gallium was discovered, but had been predicted my Mendeleev in his table

12 of 16

Properties of Metals

High melting point
Condcuts electricity

13 of 16

Group 8

Group 8 Elements are Noble Gasses, they are very unreactive and decrease in reactivity as you go down the group as they have full outer shells

14 of 16

Group 1

Group 1 elements are Alakli metals and increase in reativity as you go down the group because they have more shells. they must be stored under oil because they react quickly with the air.
When Lithium is placed in water it fizzes and moves aound quickly
Sodium fizzes and moves more
Potassium has a purple flame and fizes and moves more.
Rubidium has a little explosion
Cesium makes a big explosion

You tell that the solution left after a Group 1 element has reacted with water is alkaline if the universal indicatior turns purple.

15 of 16

Group 7

Elements in group 7 are hallogens. Flourine is the most reactive element of group 7. As you go down the group, the boiling and melting point increases. Bromine is a liquid at room temperature.

16 of 16


No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Atoms resources »