GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Nucleons
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atomic mass units
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Isotopes
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protons and electrons
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Detailed explanation-1: -Almost all of the mass of an atom is located in the nucleus, with a very small contribution from the electron cloud. Protons and neutrons are bound together to form a nucleus by the nuclear force.
Detailed explanation-2: -Mass number of an atom is defined as the sum of number of protons and neutrons present in the nucleus of an atom.
Detailed explanation-3: -An atomic nuclei consist of positively charged particles (protons) and uncharged particles (neutrons). An atom is composed of a positively charged nucleus, and electrons revolving around it in defined circular orbits. The nucleus is very small/dense when compared to the rest of the atom.
Detailed explanation-4: -The nucleus is a collection of particles called protons, which are positively charged, and neutrons, which are electrically neutral. Protons and neutrons are in turn made up of particles called quarks.