Question

what is the electronic configuration of an atom that has a proton number of 5 and a mass number of 11?​

Answer 1

Answer:

The mass number is given at the top left of the elements symbol, for example, sodium has a mass number of 23. We know that the atomic number of sodium is 11. This tells us that sodium has 11 protons and because it is neutral it has 11 electrons.

Answer 2

Answer:

Boron have atomic number 5 and mass number 5+6=11. Therefore, K shell will accommodate 2 electrons and L shell will accommodate remaining electrons i.e 3. The electronic configuration is 2, 3.

Explanation:

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