A pine tree seed was produced by self-pollination. How many parents does this seed have? one
two

This is a mixture that has the same composition throughout.

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?

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+