2(a)
The following table represent the elements and the atomic number.
With reference to this, answer the following using only the alphabets given in the table.
| Element | Atomic number |
|---|---|
| P | 13 |
| Q | 7 |
| R | 10 |
(i) Which element combines with hydrogen to form a basic gas?
(ii) Which element has an electron affinity zero?
(iii) Name the element, which forms an ionic compound with chlorine.
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(i) Q combines with hydrogen to form a basic gas.
(ii) R has electron affinity zero as it's octet is complete and it is a stable element.
(iii) P forms an ionic compound with chlorine as it has +3 valency.