Elements, mixtures and compounds

Elements Made up of only one kind of atom. There

are approx 109 elements known.

Elements Made up of only one kind of atom. There

are approx 109 elements known. Some elements exist naturally in small

bonded groups called molecules, so have a different formula to that on the periodic table.

Elements Made up of only one kind of atom. There

are approx 109 elements known. Some elements exist naturally in small

bonded groups called molecules, so have a different formula to that on the periodic table. EG H2 is hydrogen, O2 is oxygen etc.

Elements Made up of only one kind of atom. There are

approx 109 elements known. Some elements exist naturally in small

bonded groups called molecules, so have a different formula to that on the periodic table. EG H2 is hydrogen, O2 is oxygen etc.

Elements can be classified by their state at room temperature. EG solid, liquid or gas.

Elements Made up of only one kind of atom. There are

approx 109 elements known. Some elements exist naturally in small bonded

groups called molecules, so have a different formula to that on the periodic table. EG H2 is hydrogen, O2 is oxygen etc.

Elements can be classified by their state at room temperature. EG solid, liquid or gas.

https://www.youtube.com/watch?v=zGM-wSKFBpo

Mixtures and compounds Substances which contain different

elements are either mixtures or compounds.

Mixtures and compounds Substances which contain different

elements are either mixtures or compounds.

Mixtures – can be easily physically separated.

Mixtures and compounds Substances which contain different

elements are either mixtures or compounds.

Mixtures – can be easily physically separated.

Compounds – chemically joined together which makes it hard to separate.

Quick questions:1. Sort into either elements or

compounds:a) H2O

b) Sugar – C12H22O11

c) Pbd) Cl2e) Baking soda – NaHCO3

Quick questions:1. Sort into either elements or compounds:a) H2O

b) Sugar – C12H22O11

c) Pbd) Cl2e) Baking soda – NaHCO3

Elements – Pb,Chlorine (Cl2)

Compounds – water, sugar, baking soda

Names The names of a compound can tell you

what elements make it up.

Names The names of a compound can tell you

what elements make it up. If a name ends in ‘ate’ or ‘ite’ this tells

you that the compound contains oxygen atoms as well as other elements named.

Sorting out chemical formula A chemical formula is a short way of

showing the numbers of each kind of atom in one molecule of compound.

Sorting out chemical formula A chemical formula is a short way of

showing the numbers of each kind of atom in one molecule of compound.

The letters show while elements make up the compound.

CuSO4 MgCl2

Sorting out chemical formula A chemical formula is a short way of showing

the numbers of each kind of atom in one molecule of compound.

The letters show while elements make up the compound.

The numbers underneath show how many of each kind of atom make up one molecule.

CuSO4 MgCl2