SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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mass of an atom
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number of protons in an atom
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number of both protons and neutrons in an atom
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number of neutrons in an atom
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Detailed explanation-1: -atomic number, the number of a chemical element in the periodic system, whereby the elements are arranged in order of increasing number of protons in the nucleus. Accordingly, the number of protons, which is always equal to the number of electrons in the neutral atom, is also the atomic number.
Detailed explanation-2: -The atomic number is the number of protons in the nucleus of an atom. The number of protons define the identity of an element (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present).
Detailed explanation-3: -The Atomic number refers to the number of protons and the mass number refers to the sum of protons and neutrons in an atom.
Detailed explanation-4: -The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons.
Detailed explanation-5: -The number of protons in an atom of an element is unique to that particular element, and this number is called atomic number.