The atomic number of sodium is 11 and its mass number is 23. It has

11 neutrons and 12 protons

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12 protons and 11 electrons

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11 electrons and 12 neutrons

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12 electrons and 11 neutrons

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Solution

The correct option is C 11 electrons and 12 neutrons
The atomic number and mass number of sodium are 11 and 23 respectively.
This suggests that the number of protons in sodium =11 and mass number (the number of nucleons i.e. proton and neutrons) in sodium =23. Thus, the number of neutrons =12 and also Since no. of protons = no. of electrons =11 So, they are similar.

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Similar questions

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

An atom of sodium has an atomic number of 11 and a mass number of 23. Which of the following statements is correct?

The atomic number and mass number of sodium are 11 and 23 respectively. Find the number of sub-atomic particles in Sodium.

23

11

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