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Q.

The mass number of nucleus is_______.

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a

Sometimes equals to its atomic number

b

Always more than its atomic number

c

Always less than its atomic number

d

Sometimes less than and sometime more than its atomic number

answer is A.

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Detailed Solution

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  • The total number of protons and neutrons in an element's atomic nucleus is known as the element's mass number. A is used to signify it. A varies depending on the ingredient. Sometimes a nucleus' mass number matches its atomic number, as in the case of hydrogen, when the number of neutrons is zero.
  • Atomic number = mass number, respectively.
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