How many electrons are present in `Na^+` ion?

The static electric charge on the oil drop is -3.2044xx10^(-19)C . How many electrons are present on it ?

The atomic number (Z) of an element is 25. In its ground state, how many electrons are present in "N" shell ?

How many electrons are present in sulphur ?

How many d - electrons are present in Ag and Ni atoms ?

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

Write the symbol of the outermost shell of magnesium (Z = 12) atom. How many electrons are present in the outermost shell of magnesium?

How many unpaired electrons are present in divalent manganese ion ?