A neutral atom of aluminum has a mass number of $27$ and an atomic number of $13$ . How many electrons does it have?

14

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13

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27

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40

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It is impossible to determine from the information given

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Solution

The correct option is D $13$
Atomic number is equal to the number of protons=13.
Number of protons is equal to the number of electrons as the atom is electrically neutral. So number of electron is 13.

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A neutral atom of aluminum has a mass number of 27 and an atomic number of 13. How many electrons does it have?

The correct option is D 13Atomic number is equal to the number of protons=13. Number of protons is equal to the number of electrons as the atom is electrically neutral. So number of electron is 13.

A neutral atom of aluminum has a mass number of $27$ and an atomic number of $13$ . How many electrons does it have?

The correct option is D $13$
Atomic number is equal to the number of protons=13.
Number of protons is equal to the number of electrons as the atom is electrically neutral. So number of electron is 13.