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Question no.3, 8 please​

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ANSWER:

here is your ans mate

A 3 ---. Elements present are calcium and oxygen.

A 8---. Sodium CHLORIDE (NaCl) is a typical ionic compound. ... Sodium has 1 electron in its outermost shell, and CHLORINE has 7 ELECTRONS. It is easiest for sodium to lose its electron and form a +1 ion, and for chlorine to gain an electron, forming a -1 ion.

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