GK
CHEMISTRY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Protons, Neutrons, Electrons
|
|
|
Protons only
|
|
|
Protons and Electrons
|
|
|
Protons and Neutrons
|
Detailed explanation-1: -The mass of an atom is contributed by proton and neutron. An electron has a negligible mass which does not contribute much to the mass of an atom. As protons and neutrons lie inside the nucleus, so mass of an atom is majorly present in the nucleus.
Detailed explanation-2: -The protons contribute far more to an atom’s mass: one proton weighs about 2000 times more than one electron and there are equal numbers of protons and electrons in any neutral atom.
Detailed explanation-3: -Only protons and neutrons contribute to an atom’s mass value.
Detailed explanation-4: -proton, stable subatomic particle that has a positive charge equal in magnitude to a unit of electron charge and a rest mass of 1.67262 × 10−27 kg, which is 1, 836 times the mass of an electron.