What do these two changes have in common? rust forming on a metal gate
cooking a pancake

A : Both are only physical changes.

B : Both are chemical changes.
C : Both are caused by heating.
D : Both are caused by cooling.

C

Explanation:

Im certain. Because cooking a pancake requires it to be heated through conduction. And rust form from rain and weather, and then sunlight hits it causing it to absorb into the gate.

Use the trends in the ionization energies of the elements to explain the following observations. (a) Elements on the left side of the periodic table are more likely than those on the right to form positive ions. Ionization energies measure the tendency of a neutral atom to resist the loss of electrons.

Not any answer choices so this is the best answer that i can give you.