Question

Write scientific reasons.
a)Atomic radius goes on decreasing while going from left to right in a period.​

Answer 1

Answer:

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Explanation:

Atomic radius goes on decreasing while going from left to right in a period because of an atomic number of the elements increases which means the number of protons and electrons in the atoms increases(the extra electrons being added to the same shell).

Answer 2

Answer:

i) In a period while going from left to right, atomic radius goes on decreasing and the atomic number increases one by one, that means positive charge on the nucleus increases by one unit at a time.

ii) However, the additional electron is added to the same outermost shell. Due to the increased nuclear charge the electrons are pulled towards the nucleus toa a greater extent, as a result the sizeof atom decreases i.e., atomic radius decreases.

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