1. Chemical Formula
LO: Become familiar with the symbols of common elements and understand that elements are made of atoms;
Swap your theory book with your partner Compare and discuss your answers with each other and mark each others homework

2. Name the position What is the Group and Period of this element? K Cl CMg
Group 7
Group 1
Group 4
Group 2
Period 3
Period 3
Period 2
Period 4 1 2 3 4 5 6 7 H 1 He 2 Li Be B C C N O F Ne 3 Na Mg Mg Al Si P S Cl Cl Ar 4 K K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr 5 Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe 6 Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn 7 Fr Ra Ac Rf Db Sg Bh Hs Mt ? ? ?

3. Q1. Name a metal in group 1 that is in the same period as Magnesium.
Q2. Name a metal in group 2 that in the same period as Lithium.
Q3. Name a non-metal in the same group as Nitrogen.
Q4. Name a noble gas in the same period as Oxygen.
Q5. Name a gas in group 7 that is in the same period as Aluminium.

4. Chemical formula of elements
Each element has a symbol.
Some elements exist as particular numbers of atoms bonded together.
This fact can be represented in a formula with a number which shows how many atoms. O N H P
Formula
Molecule
Atom O2 N2 H2 P4

5. Rule 1: When two elements combine the ending is usually ” ……………ide”
Rule 1: When two elements combine the ending is usually ” ……………ide”. metal goes first
Sodium Chloride
Magnesium Oxide
Iron Sulph___ Cl Na Mg O Fe S

6. Rule 2: When three or more different elements combine and one of them is Oxygen, the ending will be “………ate”.
metal goes first
Copper Sulphate
Calcium Carbonate O O Cu S O O O O C Ca O

7. Rule 3: When two identical elements combine, the name does not change.
H2 = Hydrogen
F2 = Fluorine
N2 = Nitrogen
Cl2 = Chlorine
O2 = Oxygen H F N Cl O

8. Name the following compounds/molecule
MgCl2
ZnO
MgSO4
AgNO3
Na2O KI
CuSO4

9. Draw a line between the compound and its name:
Magnesium Carbonate
NaCl
Magnesium Chloride
Iron sulphide
Lead nitrate
Copper sulphate
Sodium Chloride
Potassium Iodide
Calcium Carbonate
Pb(NO3)2
FeS
CuSO4
CaCO3
ZnF2
MgCO3 KI
Zinc Fluoride
MgCl2

10. 1. How many atoms of Hydrogen in one molecule of Methane CH4 ?
2. How many atoms of Nitrogen in one molecule of Lead nitrate Pb(NO3)2 ?
3. Sodium oxide has two atoms of sodium for every atom of oxygen. What is the formula for sodium oxide?
4. Magnesium chloride has one atom of Magnesium for every two atoms of chlorine. What is the formula for Magnesium chloride?
5. How many atoms of Nitrogen in one molecule of Ammonia NH3 ?

11. KNO3 N2 AgNO3 Carbon dioxide KI CaCO3 Pb Au Cl2 Air CuSO4 K NaCl
WORD SPLAT PLENARY
KNO3 N2
AgNO3
Carbon dioxide KI
CaCO3 Pb Au
Cl2
Air
CuSO4 K
NaCl
Magnesium H

12. Potential starter
TASK: Use the periodic table in textbook 1 to find the name or symbol of these elements
Element name Symbol
Gold Si Ag
Starter recap: questions
Where can you find every element?
Write down 3 chemical symbols of 3 elements of your choice?
Write down and chemical formulas you can think of eg. H2O?