Explain the difference between atomic mass and atomic number write formula and explain

What causes hydrogen bonding? Select one: a. Motion of electrons b. Bonding of hydrogen to a highly electronegative element, specifically N, O or F c. Sharing of electron pairs d. Attraction between ions

If the mass of a material is 42 grams and the volume of the material is 13 cm ^3 what would the density be

The graph gives the number of varicella (chicken pox) cases between 1972 and 2011. Varicella is an infectious disease caused by a virus. The disease causes rash, itching, and fever in patients. The varicella vaccine was introduced in 1995.

Technetium-104 has a half life of 18.0 minutes. how much of a 165.0 g sample remains after 90.0 minutes?

According to Le Chatelier's principle, what always happens to the equilibrium of a reaction when the temperature is reduced? A.) It shifts to the right. B.) It shifts to the left. C.) It shifts in the exothermic direction. D.

Warm air pushes cool air downward Rising air cools and becomes more dense than the air around it. True/false

How does a nuclear reactor work

Why is a very small amount of cerium oxide nanoparticles need: A) the nanoparticles are elements B) the nanoparticles are very reactive C) the nanoparticles have a high surface area of volume ratio

How do electrons move between atoms to create electricity?

Which scientific law predicts that the mass of the reactants before a chemical reaction will equal the mass of the products after the reaction has taken place?