Multiple choice general knowledge math & puzzles

If one neutron is added to a helium nucleus, the result is:

  1. Lithium

  2. Helium

  3. Hydrogen

  4. Carbon

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The identity of an element is determined solely by the number of protons in its nucleus. Adding a neutron changes the isotope of the element but not the element itself. Therefore, adding a neutron to Helium results in a heavier isotope of Helium.