faizah yasmeen on Nearpeer MDCAT Common Room
sir hamaray kpk k book may lika hay k group one elements ki density from top to bottom increase hothi hay q k mass increase hotha hay or mass ka effect volume say overall zyada hotha hay iss liye density mass pay depend karthi hay or iss may exception b hay k potassium ki density kam hay sodium say.SIR DOUBT solver say b poocha but clear nhi hua



