Which of the following elements has the smallest atoms?
A) Ca
B) K
C) Mg
D) Na

Question

Quizplus · Accepted Answer

Mg (Magnesium) has the smallest atoms among the options given. This is because atomic size decreases across a period from left to right in the periodic table. Since Mg is to the right of Na and to the left of Ca in the same period, it is smaller than both. K is in the period below Na and Mg, making its atoms larger due to the additional electron shell.

Which of the Following Elements Has the Smallest Atoms