Question

the position of element A,B,C,D in the modern periodic table is given

group-1. group-2
period-3. A. B
Perioi-4. C. D
(1) which element has the highest atomic size? why?
(2) which element has the least metallic property?why?​

Answer 1

Answer:

Atomic radii vary in a predictable way across the periodic table. As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest.

Answer 2

Answer:

i) E as atomic size increases down the group due to more number of shells.

ii) B as atomic size decreases on moving from left to right due to an increase in effective nuclear charge.

Explanation:

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