Metals and non-metals in the periodic table
2 marks · EasyExplain, using your knowledge of the periodic table, why elements in Group 2 have similar chemical properties.
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Elements in Group 2 have similar chemical properties because they all have two electrons in their outer shell. This causes them to react in similar ways.
Must show: Reference to same number of outer shell electrons, Link to similar chemical properties
Also accept: All Group 2 elements have 2 electrons in their outer shell, so they react similarly.
Common mistakes: Saying they are in the same group without mentioning electrons
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Marking points
M1 · 1 mark · States all Group 2 elements have two electrons in their outer shell.
M1 · 1 mark · Links number of outer shell electrons to similar chemical properties (how they react).
Worked solution
Elements in Group 2 have the same number of outer shell electrons (2).
This causes them to react similarly, as their chemical reactions depend on their outer electrons.