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WorksheetsGCSE 1.1 Chemical Symbols
Total questions: 16
Worksheet time: 9mins
What is the shorthand way of representing elements?
Chemical names
Chemical symbols
Chemical numbers
Chemical strucutre
What does a chemical symbol consist of?
Only one letter
two numbers
one or two letters
four letters
The first letter of the chemical symbol is always a.......
Capital
Number
Lower case
subscript
The second letter of a chemical symbol is always a ........
Upper case
Lower case
subscript
superscript
Some elements have symbols that are simply the first letters of their name:
O C N
What are the elements indicated by these letters?
Oxygen
Carbon
Nitrogen
Oxygen
Cobalt
Nitrogen
Ozone
Carbon
Nitrogen
Oxygen
Carbon
Nickel
Some elements have symbols that come from the first and second or first and third letters of their names:
Ca Mg Ne
What are the elements indicated by these letters?
Carbon
Magnesium
Nitrogen
Calcium
Magnesium
Nylon
Calcium
Magnesium
Neon
Carbon
Manganise
Neon
There are also some elements that have symbols that are not linked to their names.
Pb Au
What are the elements indicated by these letters?
Lithium
Gold
Potasium
Amber
Lead
Gold
Argon
Iron
The formula of a compound provides two key pieces of information
Name and number of atoms of each element
Name and size of nucelus of each atom
Size and number of atoms of each element
Name and weight of the symbol
Sodium chloride contains the elements sodium (Na) and chlorine (Cl). The formula contains 2 atoms in total (1 × Na and 1 × Cl).
(a)
Magnesium bromide contains the elements magnesium (Mg) and bromine (Br). The formula contains 3 atoms in total (1 × Mg and 2 × Br).
MgBr2
MGBr2
2MGBr
Calcium carbonate contains the elements calcium (Ca), carbon (C) and oxygen (O). The formula contains 5 atoms in total (1 × Ca, 1 × C and 3 × O).
CACO3
3CACO
CaCO3
CAC3O
Iron(III) hydroxide contains the elements iron (Fe), oxygen (O) and hydrogen (H). The formula contains 7 atoms in total (1 × Fe, 3 × O and 3 × H).
Fe(OH)3
3Fe(OH)
Fe3(OH)
1Fe(OH)4
When metals react with non-metals, they form
Ironic compounds
Ionic compounds
organic compounds
Ionic bonds
There are three stages to writing the formula of an ionic compound:
Identify the symbol,
Cancel out the charges,
Construct the formula
Identify the ions,
Cancel out the charges,
Construct the formula
Identify the symbol,
Cancel out the mass,
Deconstruct the formula
Identify the ions,
Cancel out the forces,
Construct the formula
What is the formula of the ionic compound Lithium chloride?
LiCl
LiCL2
ClLi
2ClLi
What is the formula of the ionic compound Aluminium Oxide?
ALO2
Al2O3
2AlO3
AlO2
