Four elements A, B, C and D have the following electron arrangements in their atoms:

A 2, 8, 6


B 2, 8, 8


C 2, 8, 8, 1


D 2, 7


(a) What type of bond is formed when element C combines with element D?


(b) Which element is an inert gas?


(c) What will be the formula of the compound between A and C?

(a) Ionic bond is formed when element C combines with element D

(b) The element B is an inert gas as it has complete octet configuration.


(c) The formula of the compound between A and C will be C2A. This is because A needs two electrons to complete its octet.


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