Answer : The correct option is, (C) six
Explanation :
There are three types of subatomic particles.
1) Protons
2) Neutrons
3) Electrons
Protons and neutrons are present inside the center of the nucleus and electrons are present outside the nucleus.
As we know that in the neutral atom, the number of electrons is equal to the number of protons.
The number of neutrons = Atomic mass - Number of protons
If an uncharged atom has six electrons then the nucleus of this atom must contain six protons.
Hence, the correct option is, (C) six