Question

Be mg ca are the first three elements of 2nd group which of these ekements has highest atomuc size why

Answer 1

calcium (CA) because the atomic size increase down a group

Answer 2

CALCIUM HAS THE BIGGEST ATOMIC SIZE OF THESE THREE BEC. AS WE GO DOWN A GROUP OF PERIODIC TABLE THE SHELLS OF AN ATOM GRADUALLY INCREASES .THUS ITS ATOMIC SIZE ALSO INCREASES..ELECTRONIC CONFIG.-
BE-2,2
MG-2,8,2
CA-2,8,8,2