GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It is electrically neutral
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Its central part contains protons and neutrons
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It has an equal number of protons and neutrons
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The number of protons determines the chemical property of an element
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Detailed explanation-1: -The number of protons is always the same in atoms of the same element. The number of neutrons can be different, even in atoms of the same element. Atoms of the same element that contain the same number of protons, but different numbers of neutrons, are known as isotopes.
Detailed explanation-2: -It is not necessary that the protons and neutrons are the same in number in an atom. so, the given statement is false. Examples: In the Sodium (Na) atom, the number of protons = 11, but the number of neutrons = 12 ( here the number of protons is not equal to the number of neutrons.)
Detailed explanation-3: -Hence, option (A) is correct., atoms are not able to exist independently is not true about an atom.
Detailed explanation-4: -Atoms of a particular element must have the same number of protons but can have different numbers of neutrons. When an element has different variants that, while all having the same number of protons, have differing numbers of neutrons, these variants are called isotopes.