Question

justify the statement
Na+ is smaller in size than Na
pls answer in points

Reasons are
Number of shells
Nuclear pull

Define it
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Answer 1

Answer:

Na defines sodium atom which has 11 electrons (2, 8,1)

while Na+ is positive ion of sodium which has 10 electrons (2, 8) as it gives away one electron to attain electronic configuration of neon and attains positive charge.

Due to 2 shells of Na+ atom its atomic size reduces and due to 3 shells of Na its atomic size becomes more than Na+ atom.

hence Na+ is smaller in size than Na.

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Answer 2

Na+ is smaller in size than Na. This can be explained as:

• Na+ is a cation, this it has more number of protons than electrons.

•Na+ has less electron in last shell L as compare to Na which has last electron in M shell.

• the nucleus pulls electrons with greater force and hence radius of orbit decreases.

• due to stronger electron pull the size of Na+ atom decreases.

That is why na+ has less atomic size as compare to an.