Referring to the periodic table, which of the following atoms has the smallest atomic radius?

Question

Quizplus · Accepted Answer

Hydrogen (H) has the smallest atomic radius among the options given. Atomic radius generally decreases across a period from left to right due to the increase in nuclear charge, which pulls the electrons closer to the nucleus. Hydrogen, being the first element in the periodic table, has the smallest atomic radius because it has the fewest electrons and the least electron-electron repulsion in its electron cloud.

Referring to the Periodic Table, Which of the Following Atoms