Question

The number of electrons in a cation is given by :

• A. the atomic number of the element
• B. the atomic number $+$ charge on the cation
• C. the atomic number $-$ charge on the cation
• D. mass number $-$ atomic number

Answer 1

Answer: (C)

the atomic number $-$ charge on the cation

No. of electrons= no. of protons=atomic number.

The charge on the cation= no. of electrons lost by atom.

So, electrons present in cation=Atomic number-charge on cation