_____ number of protons are present in an element X with an atomic number Z and mass number A.

A-Z

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A+Z

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Solution

The correct option is C Z
.

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Similar questions

Consider the following statements:

1. The number of protons in the nucleus of an atom of a given element is called the atomic number of that element.

2. Mass number of an atom is defined as the sum of number of protons and neutrons present in the nucleus of an atom.

3. Atoms of an element that have the same atomic number (Z) but different mass number (A) are called isotopes.

Which of the above statements is incorrectly stated?

An element has atomic number 19 and mass number 39. How many electrons and protons are present in its unipositive ion?

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