The atomic number of an atom is equal to the number of.. a) electrons plus protons. b) neutrons. c) neutrons plus protons. d) nuclei. e) protons.

This is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table.

How does the atmosphere to make earth livable? check all that apply. causes the seasons contains oxygen provides warmth creates important nutrients blocks harmful energy from the sun plz like !

Athe top of a hill, an athlete on a skateboard has x joules of mechanical energy. how much mechanical energy will she have at the bottom of the hill? ignore the effects of friction.