Chemistry
(a) Elements X, Y and Z have atomic numbers 6, 9 and 12 respectively. Which one :
(i) forms an anion,
(ii) forms a cation,
(b) state type of bond between Y and Z and give its molecular formula.
Answer
The electronic configuration of :
X (6) = 2, 4
Y (9) = 2, 7
Z (12) = 2, 8, 2
(a) Y forms an anion as it needs just one more electron to complete its octet.
(b) Z forms a cation. It will lose its 2 electrons to achieve a stable electronic configuration thus forming a cation.
(c) Ionic bond is formed between Y and Z and its molecular formula is ZY2.
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