An element has an atomic number 12. How may electrons will be present in the K, L and M energy shells of its atom ?

An element has an atomic number 12. How many electrons will be present in the K, L and M energy shells of its atom ?

The atomic number of cation M^(2+) is 12. How many electrons are present in it ?

How many electrons are present in the M shell of an atom odf an el,ement with atomic number (z)24?

The atomic number of an element 'M' is 26. How many electrons are present in the M-shell of the element in its M^(3+) state ?