Em uma cadeia orgânica os átomos mais comuns são: H (hidrogênio); O (Oxigênio); Nitrogênio (N) e Carbono (C). Quantos elétrons cada um desses elementos compartilham em um ligação?

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.