Which is a model that shows only the valence electrons of an atom?

A. atomic model

B. heliocentric model

C. electron dot diagram

D. Hertzsprung-Russell diagram

What type of electromagnetic wave is used in security pens? a. x-rays c. microwaves b. visible light d. ultraviolet radiation select the best answer from the choices provided

Oxygen and hydrogen gas are at the same temperature t. what is the ratio of kinetic energies of oxygen molecule and hydrogen molecule if oxygen is 16 times heavier than hydrogen.

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island