Question

Element x,y,z has 6,9,12 atomic numbers so which one forms an anion and which one forms cation

Answer 1

Here, X has atomic number 6 so it's electronic configuration is  2, 4 .
Y with atomic number 9 has electronic configuration 2,7.
Z atomic number 12 has electronic configuration 2,8,2.

So, here Y is anion with valency -1.
Z is cation with valency +2.
X has 4 valence electrons.

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