A) 0
B) 5
C) 4
D) 2
🧠 Explanation:
A typical hydrogen atom has 0 neutrons.
Its nucleus consists of only one proton, which makes it the simplest and lightest element.
However, heavier isotopes of hydrogen, like deuterium and tritium, have 1 and 2 neutrons respectively.
This lack of neutrons in regular hydrogen makes it unique among all elements.
