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1.2 The periodic table

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Question 8
F

A helium atom has only 2 electrons, and both of them are in its outer shell. Helium is still placed in Group 0 with the other unreactive gases. Why is helium unreactive?

[1]
A

Its outer shell can hold 8 electrons, so there are 6 spaces left in it

B

Its atoms have equal numbers of protons and electrons, so they are neutral

C

Its outer shell can hold only 2 electrons, so its outer shell is already full

D

Its atoms have equal numbers of protons and neutrons, so they are stable

Markscheme

1.2 The periodic table Questions

  1. GCSE
  2. /Chemistry
  3. /1.2 The periodic table

40 exam-style questions on AQA GCSE Chemistry 1.2 The periodic table, covering 1.2.1 The periodic table, 1.2.2 Development of the periodic table, 1.2.3 Metals and non-metals, 1.2.4 Group 0, 1.2.5 Group 1, and 1.2.6 Group 7. Each one has a worked solution and a mark scheme showing where the marks go.

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