Question

In which case effective nuclear charge is minimum (a) Be , (b) Be2+ (c) Be3+ (d) Equal

Answer 1

Hi friend,

As the +ve charge increases effective charge is increases....i think the answer is c)

Answer 2

effective nucleur charge directly proportional to { number of proton /number of electrons }
e.g when , a cation is formed , effective nucleur charge { number of protons /number of electrons }increases and electrons are more tightly bonded the nucleus .

according to above explanation :
effective nucleur charge greater in Be^+3 ,because {number of protons/numbdd of electrons } increases more compare to another