The mass of the atom is determined by
The mass of the atom is determined by
The correct option is B Neutron & proton
Explanation for correct option
(B) The mass of the atom is equal to the total sum of the number of protons and neutrons present in the nucleus of that atom, so mass is determined by the number of protons and neutrons present in it.
Explanation for incorrect option
(A) Neutrons are neutral sub-atomic particles and alone neutrons cannot describe the mass of atom.
(C) Electrons are present outside the nucleus and does not contribute to the mass of atom.
(D) Electrons are present outside the nucleus and does not contribute to the mass of atom, the option containing electron is incorrect.
Thus, mass of the atom is equal to the total sum of the number of protons and neutrons present in the nucleus of that atom.
Therefore, option (B) neutron & proton is correct answer.
Neutron & proton
Explanation for correct option
(B) The mass of the atom is equal to the total sum of the number of protons and neutrons present in the nucleus of that atom, so mass is determined by the number of protons and neutrons present in it.
Explanation for incorrect option
(A) Neutrons are neutral sub-atomic particles and alone neutrons cannot describe the mass of atom.
(C) Electrons are present outside the nucleus and does not contribute to the mass of atom.
(D) Electrons are present outside the nucleus and does not contribute to the mass of atom, the option containing electron is incorrect.
Thus, mass of the atom is equal to the total sum of the number of protons and neutrons present in the nucleus of that atom.
Therefore, option (B) neutron & proton is correct answer.
