Most compounds with ionic bonding, e.g. metal salts, dissolve in water<span>. The oxygen atoms of </span>water molecules<span> are attracted to cations (ions with a positive charge) and</span>water molecules<span> surround it. These </span>water molecules<span> attract more </span>water molecules<span>and hydrogen-bonds form between them. ... All these </span>molecules<span> are polar.</span>
Darwin first major break through was finding natural selection by using the pea pod method and noticing how some were yellow and some were green with different textures.
Bohr determined that there are discrete (unique, different from one another) energy levels in the atom and that electrons will orbit the nucleus within these energy levels, known as orbitals.
