Which best describes the speed and appearance of most fronts?

Covalent network solids typically have melting points and boiling points. the chemical formula of a network solid indicates in the molecule.

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false

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+