The atomic number of an element is 11 and its mass number is 23. The correct order representing the number of electrons, protons and neutrons respectively in this atom is

11, 11, 12

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11, 12, 11

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12, 11, 11

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23, 11, 23

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Solution

The correct option is A 11, 11, 12
Number of protons = number of electrons

Atomic Number = 11

Atomic mass = number of neutrons + number of protons

So, Number of neutrons = 23 - 11 = 12

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Similar questions

B

11

23

If sodium has atomic number 11 and mass number of 23, then the number of protons, neutrons, and electrons in an uncharged atom is :

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