atomic
size refers to the radius of an atom. The atomic size may be visualized as the
distance between the centre of the nucleus and the outermost shell of an isolated stom
The atomic radius of the hydrogen atom is 37 pm pm. Atomic size decreases in going from
left to right along a period.
Elements of 2
period atomic radius
U13)
C16)
133
89
N (11)
Al (13)
516
Elernents of 3
period atomic radius
(pm)
125
Q17. (i) Identify the reason for the decrease of atomic size in the period-
(a) New shells are being added which increase the distance between outermost
electrons and nucleus.
(b) Increase in nuclear charge tends to pull electrons closer to the
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Answer:
Increase in nuclear charge tends to pull electrons closer to the
Explanation:
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