Several genes change in a population of crows that no longer mate with crows in other populations this is an example of ?

How is the atomic number of a nucleus changed by alpha decay

If it is an isoelectronic series select true, if not select false. o2-, s2-, se2-, te2- na+, k+, rb+, cs+ n3-, p3-, as3-, sb3- ag, cd+, sn3+, sb4+ f-, cl-, br-, i- f-, ne, na+, mg2+ s2-, s, s6+

If 10.5 l of a at 0.98to 1.50 , is ?