Question

Three electron(s) are removed from a silicon atom. Enter the chemical symbol for the element

Answer 1

Electronic configuration of silicon is as-

1s²2s²2p⁶3s²3p² [chemical symbol of silicon is Si]

So silicon (Si) has four valance electrons i.e. Si has maximum valancy of four. Now if three electrons are removed from a silicon atom, a cation will be formed with charge +3. Therefore, the symbol of the element will be Si^{​​​​​+3}.