Y9 Review / Y10 Check Up
1. Work out the relative formula mass of the following (3)
CH4 __________ CaCO3 __________ Li2SO4 __________
2i. Write the electronic configuration of a magnesium atom (1)
________________________
ii. Write out the electronic configuration of magnesium ion (1)
________________________
iii. Which of these group 1 metals is the most reactive? (1)
Lithium
Caesium
Potassium
Sodium
3i. Complete this grid to show the formula of the following ionic compounds
(3)
Cl-
O2-
Mg2+
MgCO3
Na+
K+
CO32-
Na2O
KCl
ii. Which of the ions in the table above is a polyatomic ion? (1)
________________________
4i. The general formula for alkanes is CnHn+2
What is the formula of the alkane with 12 carbon atoms? (1)
________________________
ii. Write out these displayed formula as molecular formula (2)
___________
___________
iii. Complete these dot cross diagrams to show the covalent bonding (2)
Show only the outer layers of electrons
H Cl
F Cl
iv. Write out these molecular formula as displayed formula (2)
C2H6
CO2
5. Balance the following equations (3)
CH4 + O2  CO2 + H2O
Mg + H2O  Mg(OH)2 + H2
Al
+
H2SO4

Al2(SO4)3
+
H2
6. Hydrochloric acid and magnesium carbonate react to form magnesium
chloride, carbon dioxide and water. Write out a word equation and then a
balanced formula equation for this reaction. State symbols are not needed.
Word equation (2)
Formula Equation (2)