18. How are ionic compounds formed?

A) Atoms share electrons.

B) Elements change into different elements.

C) Atoms gain/lose electrons and are held together by electrostatic forces.

D) Atoms share protons.

In which type of wave do particles move in circles

When hydrogen combines with oxygen to produce water, this is what kind of reaction? A) double-displacement B) endothermic C) synthesis D) combustion

Franklin has a new Ph. D in wildlife biology. His studies focused on the transmission of diseases in trees in the national forests. What kinds of workplaces would most likely be interested in hiring Franklin? Check all that apply.

Which of the following elements are generally unreactive? a. neon (Ne) b. fluorine (F) c. xenon (Xe) d. radon (Rn)

This is needed to do work, change position, or move matter

A penny has a mass of 2.50g and the moon has a mass of 7.35 X 10^22 Use this information to answer the questions below. Be sure your answers have the correct number of significant digits.

If a car tire has a diameter of 3232 inches, what is the approximate circumference of the tire?

9) Bettina spoke into a microphone during the school play to increase the sound of her voice so the audience could hear her speak.

Explain what happens to the average kinetic energy thermal energy and temperature of a substance when the particles in the substance slows down

Which of the following could be used to describe the rate of a reaction? change in time/change in concentration change in mass/change in concentration change in concentration/change in time change in concentration/change in mass