Nobles gases, since they all have 8 e- on their last layer of electrons.
There are 6 protons, 7 neutrons, and 6 electrons since the atomic mass is rounded to 13.
Ionic compounds<span> in solution react </span>faster<span> than molecular </span>compounds<span>. This </span>is <span>because </span>Ionic compounds<span> break apart to form free </span>ions. Therefore, there are no bonds<span> to break </span>so<span> the </span><span>reaction is fast</span>
Precipitation occurs when the product of the ion concentration exceeds the Ksp.
