Question

the diagram below shows an atom of which element? *
1 point
(atom diagram with protons, neutrons, electrons)
hydrogen (h)
helium (he)
lithium (li)
beryllium (be)

Explanation:

To determine the element, we analyze the atom's structure:

• Protons (red, +): Count is 2 (since atomic number = number of protons).
• Neutrons (blue, neutral): Count is 2.
• Electrons (green, -): Count is 2 (equal to protons for neutral atom).

Helium (He) has an atomic number of 2 (2 protons, 2 electrons) and often 2 neutrons (for He-4 isotope), matching the diagram. Hydrogen has 1 proton, Lithium has 3, Beryllium has 4—none match.

Answer:

B. Helium (He)