SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Most of the mass of an atom is contained here.
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electron orbitals
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nucleus
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shells
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atomic #
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Explanation:
Detailed explanation-1: -The mass of the atom is concentrated in the nucleus (protons and neutrons are about 2000 times as heavy as electrons).
Detailed explanation-2: -Atomic nuclei consist of electrically positive protons and electrically neutral neutrons. These are held together by the strongest known fundamental force, called the strong force. The nucleus makes up much less than . 01% of the volume of the atom, but typically contains more than 99.9% of the mass of the atom.
Detailed explanation-3: -Most of the atom’s mass is concentrated in a central nucleus, which contains protons and neutrons. The nucleus is surrounded by much less massive electrons, which account for most of the volume occupied by the atom.
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