Cations are ions that are positively charged. Anions are ions that are negatively charged ... loses two electrons to become Zn 2+. Elements in group 18 of the periodic table – the “noble gases”, tend ...

Physicists have filled in some longtime blank spaces on the periodic table ... elements known as rare earths. "Electron affinity" is the amount of energy required to detach an electron from an ...

Cations are ions that are positively charged. Anions are ions that are negatively charged ... Credit: Technology Networks. Elements in group 18 of the periodic table – the “noble gases”, tend not to ...