Question

identify tge reason for the decrease of atomic size in the period​

Answer 1

Answer:

Periodic Trend

Within a period, protons are added to the nucleus as electrons are being added to the same principal energy level. ... Since the force of attraction between nuclei and electrons increases, the size of the atoms decreases.

Explanation:

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Answer 2

Answer:

WHILE MOVING GRADUALLY FROM LEFT TO RIGHT IS A PERIOD, THE NUMBER OF ELECTRON INCREASES IN THE OUTERMOST SHELL.  DUE TO THE INCREASE NUMBER OF NEGATIVE CHARGE IN THE OUTERMOST SHELL, IT IS ATTRACTED TOWARDS THE NUCLEUS. FOR WHICH THE ATOMIC RADIUS DECREASES, AND RESULTS IN DECREASE OF ATOMIC SIZE .

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Explanation: