Question

Given below are some elements of the modern periodic table. Atomic number of the element is given in parentheses.

A (4), B (9), C (14), D(19), E(20)
a) With the help of electronic configuration, find out which one of the above elements will have one electron in its outermost shell.
b)Which two elements belong to the same group?Give reasons of your answer.
c)Which one of the above elements belonging to the fourth period has bigger atomic radius and why?​

Answer 1

Answer:

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Explanation:

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