Question

which has greater shielding effect of beryllium and magnesium​

Answer 1

Answer:

The more electron shells there are , the greater the shielding effect experienced by the outermost electrons . In hydrogen like atoms which have just one electron , the net force on the electron is as large as the electric attraction from the neucleas.

Answer 2

Answer:

beryllium

Explanation:

Magnesium's atom is smaller than barium's atom and barium has more shielding than magnesium. This increased shielding counteracts barium's greater number of protons in the nucleus. The increased shielding and increase in atomic radius gives barium a smaller effective nuclear charge when compared to magnesium.