Question

Na+ ion resembles Ne (Neon )atom because_________ . (Atomic number of Na is 11 and Ne is 10)
a.both have last shell 11, as Na donates electron
b.both have last shell 10, as Na donates electron
c.both are highly reactive
d.both are less reactive



Please explain how you got your answer.

Answer 1

Answer:

• D

Explanation:

• The electronic configuration of neon is
• $1s {}^{2} 2s {}^{2} 2p6$
• The electronic configuration of the Na is
• $1s {}^{2} 2s {}^{2} 2p63s {}^{1}$
• But the electronic configuration of Na+
• $1s {}^{2}2s {}^{2} 2p {}^{6}$
• Because na+ donates or loses one electron

• This configuration matches neon which is a noble gas. Therefore having such a stable octet configuration, so, they are less reactive.
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