Question

which out of them has the biggest raddi? a)na 2)mg 3) k 4) ca​

Answer 1

$\LARGE\underline{\purple{\sf{Question:-}}}$

Which out of them has the biggest radii ?

1) Na

2) Mg

3) K

4) Ca

$\LARGE\underline{\purple{\sf{Required\:answer:-}}}$

Atomic radius from left to right along a period decreases while the atomic radius from top to bottom in a group increases.

Now , The given elements are Na , Mg , K and Ca. Among these elements Na and K . belong to same group and K has large atomic radii compared to Na [ Since atomic radii from top to bottom in a group increases] . Now , The other elements Mg and Ca belong to same group. Ca has large atomic radii compared to Mg [ Since atomic radii from left to right across a period decreases] . Now we should compare the atomic radii of Ca and K. Now, K and Ca belong to same period. But K has large atomic radii than Ca [ since atomic radii from left to right across a period decreases] . So , Potassium(K) has the biggest atomic radii among the given elements.

Hence , Option(3) is the required answer.

Answer 2

Answer:

\LARGE\underline{\purple{\sf{Question:-}}}

Question:−

Which out of them has the biggest radii ?

1) Na

2) Mg

3) K

4) Ca

\LARGE\underline{\purple{\sf{Required\:answer:-}}}

Requiredanswer:−

Atomic radius from left to right along a period decreases while the atomic radius from top to bottom in a group increases.

Now , The given elements are Na , Mg , K and Ca. Among these elements Na and K . belong to same group and K has large atomic radii compared to Na [ Since atomic radii from top to bottom in a group increases] . Now , The other elements Mg and Ca belong to same group. Ca has large atomic radii compared to Mg [ Since atomic radii from left to right across a period decreases] . Now we should compare the atomic radii of Ca and K. Now, K and Ca belong to same period. But K has large atomic radii than Ca [ since atomic radii from left to right across a period decreases] . So , Potassium(K) has the biggest atomic radii among the given elements.

Hence , Option(3) is the required answer.