For an atom of a given element, the number of electrons is given by _________.
the number of protons + number of neutrons
the number of proton − number of neutrons
the atomic number of the element
the mass number of the element
A
the number of protons + number of neutrons
B
the mass number of the element
C
the atomic number of the element
D
the number of proton − number of neutrons
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Solution
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Atomic number is the number of protons or electrons found in the nucleus of the atom of an element and also the positive charge in the atomic nucleus.
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Q1
Which of the following are true for an element? (i) Atomic number = number of protons + number of electrons (ii) Mass number = number of protons + number of neutrons (iii) Atomic mass = number of protons = number of neutrons (iv) Atomic number = number of protons = number of electrons
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