Which of the following phase changes is an exothermic change!

sublimation

deposition

vaporization

Melting

The energy that moving electric charges carry is called

What happens after an excited electron jumps from a lower energy level to a higher energy level? A. It permanently stays in that energy level. B. It returns to the lower energy level with the emission of a lepton. C.

Lithium and potassium have similar chemical properties because the atoms of both elements have the same (1) mass number (2) atomic number (3) number of electron shells (4) number of valence electrons

What does a argon bohr model look like

How air particles exert a pressure on the inside of the balloon

What are the red blood cells

Ionic bond form when one or more _ is transferred

The atomic number of boron is 5. what is the mass number of a boron atom with 4 neutrons?

The equation X + Y 2Z has the rate law equation shown below. Which of the following statements best describes the relationship of X on the rate of the reaction? rate = k[X]2[Y] Changing X has no effect on the reaction rate.

Myriah wants to use dimesional analysis to find out how many centimeters are in 1.4 meters