Sudoku: atoms, elements and compounds
Task
Clues
Use the answers to complete the Sudoku grid. Answers of one digit are
unshaded, answers with two digits are grey and answers with three
digits are green.
Remember:
 One digit per square
 Every column, row and 3x3 box must contain the numbers 1-9.
9
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6
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a*
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4
1 3 4
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8 6
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7 8
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© www.teachitscience.co.uk 2019
a*. The relative atomic mass of oxygen
l.
m.
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31340
The number of protons in an oxygen atom
How many atoms are in CaCO3
How many atoms are in Al2O3
What is the relative mass of a neutron?
The number of hydrogen atoms in a water molecule
The number of electrons in an atom of iron
Which group of the periodic table contains elements known as
the halogens?
How many hydrogen atoms are in ethanol: CH3CH2OH?
Which group in the periodic table contains only 1 non-metal
element; all the rest are metals?
How many elements are in H2SO4?
What is the maximum number of electrons in the first shell of
an atom?
How many protons are in a krypton atom?
The relative mass of a proton
What is the total relative formula mass of CaO?
How many electrons are in a copper atom?
The maximum number of electrons in the second shell of an
atom
What is the atomic number of astatine?
What is the electron configuration of phosphorous?
How many neutrons are in a bromine atom?
What is the relative atomic mass of sulfur?
How many electrons are in a lithium atom?
What is the total number of electrons in HCl?
How many electrons are in the outer shell of a carbon atom?
How many oxygen atoms are in sulphur trioxide?
How many neutrons are in a nitrogen atom?
How many electrons are in the outer shell of a magnesium
atom?
Page 1 of 2
Sudoku: atoms, elements and compounds
Answers
9
3
6
5
1
8
7
2
4
2
4
5
7
6
9
1
8
3
1
7
8
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6
9
3
8
7
9
5
6
4
1
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4
1
2
3
8
7
9
5
6
© www.teachitscience.co.uk 2019
5
6
9
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1
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8
9
1
6
7
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6
2
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1
9
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8
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7
7
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8
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9
1
31340
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