Chemistry
Elements X, Y and Z have atomic numbers 6, 9 and 12 respectively. Which one :
(a) forms an anion
(b) forms a cation
(c) has four electrons in its valence shell?
Atomic Structure
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Answer
(a) Y (2, 7) forms an anion.
(b) Z (2, 8, 2) forms a cation.
(c) X (2, 4) has four electrons in the valence shell.
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