Summarize the overall trend observed for ionization energy. please explain it well so I understand WILL MARK BRAINLIEST AND ALOT OF POINTS!​

See explanation!

Explanation:

Ionization energy refers to the amount of energy needed to remove an electron from an atom. Ionization energy decreases as you go down a group and increases as you go from left to right across the periodic table. The more electrons that are lost, the more positive the ion will be, and the harder it is to separate the electrons from the atom. Also the elements near the top of the periodic table and further to the right have higher ionization energies.

the measure of atoms size and the energy to remove a electron.

- aluminum and copper chloride.

- the chloride ion to separate the aluminum from the oxygen so that the aluminum can react with the copper ions (and the water molecules).