Question

a model of a helium (he) atom is shown below
which numbered part of the helium atom represents a proton?
a 2
b 3
c 4
d 1

Explanation:

In an atom, protons are located in the nucleus. In the given model of the helium atom:

• Part 1: Represents an electron (located outside the nucleus in electron - shells).
• Part 2: Represents the nucleus (a region, not a specific sub - atomic particle).
• Part 3: Represents a neutron (has no charge, located in the nucleus).
• Part 4: Represents a proton (has a positive charge, located in the nucleus).

Answer:

C. 4