The table below gives information about elements A1, A2, A3 and A4

      

The table below gives information about elements A1, A2, A3 and A4
aluminiumsjnjn4102017243.jpg
(i) In which period of the periodic table is element A2? Give a reason.
ii) Explain why the atomic radius of:
I. A1 is greater than that of A2;
II. A4 is smaller than its ionic radius.
iii) Select the element which is in the same group as A3.

  

Answers


John
i) Period 2. This is because it has two energy levels

ii) I. A2 ha s greater nucleus charge than A1 which has its electrons attracted strongly to the nucleus.

II. A4 gains electrons. Incoming electron is repelled by existing electrons making the ionic radius larger

iii) A2
johnmulu answered the question on April 10, 2017 at 11:44


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