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if an atom has 16 protons, 12 neutrons, and 18 electrons, what is the atom's electrical charge?

a. +4

b. -6

c. -2

d. +6

explain and show how you got the answer, i don't get how to do these.

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?

Selma made a diagram to compare convection and radiation. which label belongs in the area marked x? must involve temperature differences between substances or objects only occurs when molecules are in direct contact involves the movement of fluids based on density differences can occur where there is little or no matter

Ablock having mass m slides down an inclined plane. the force of friction between the block and the inclined plane is f, the block's weight is m g, and the normal force is n. (a) draw a free – body force diagram showing the forces acting on the block. (b) write down all relevant newton’s equations for a given situation.