Answer: Option (A) is the correct answer.
Explanation:
Atomic number of lithium is 3 and mass number is 7. It is known that atomic number represents the number of protons present in an atom and mass number is the sum of total number of protons and neutrons present in an atom.
Also, it is known that in a neutral atom number of protons equal number of electrons.
Therefore, in a lithium atom there are 3 protons, 4 neutrons and 3 electrons.
Atomic number of helium is 2 and its mass number is 4. Therefore, in a helium atom there are 2 protons, 2 neutrons and 2 electrons.
Hence, we can conclude that lithium has more protons, neutrons, and electrons as compared to helium.
