The number of electrons in a neutral atom with atomic number X and mass number Y will be:

(X - Y)

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(Y - X)

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(X + Y)

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Solution

The correct option is D
X

Atomic number is the number of protons in the nucleus of an atom, which is characteristic of a chemical element and determines its place in the periodic table and number of protons is equal to the number of electrons to have electrical neutrality of that atom.

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The number of electrons in a neutral atom with atomic number X and mass number Y will be:

The correct option is D X Atomic number is the number of protons in the nucleus of an atom, which is characteristic of a chemical element and determines its place in the periodic table and number of protons is equal to the number of electrons to have electrical neutrality of that atom.

The correct option is D
X

Atomic number is the number of protons in the nucleus of an atom, which is characteristic of a chemical element and determines its place in the periodic table and number of protons is equal to the number of electrons to have electrical neutrality of that atom.