The pauli exclusion principle states
a. no two electrons can have the same four quantum numbers.
b. energy levels will fill at the lowest levels first.
c. one electron will fill each orbital before pairing up.
d. the average spin of electrons will determine the number of electrons in an orbital.

What can be added to the examples section of each circle? endothermic: ice melting into water, and a heat pack becoming warm exothermic: a glow stick glowing, and fireworks exploding endothermic: ice melting into water, and an instant ice pack turning cold exothermic: fireworks exploding, and gasoline burning endothermic: a glow stick glowing, and a heat pack becoming warm exothermic: an instant ice pack turning cold, and ice melting into water endothermic: gasoline burning, and an instant ice pack turning cold exothermic: ice melting into water, and an instant ice pack turning cold

In medium-sized stars such as the sun, nuclear fusion almost always means the fusing of nuclei to form , but larger stars can produce elements as heavy as

If a molecule is polar, what kind of bonds will it have