An alpha particle is closest in atomic mass to which element?

a. H

b. He

c. Ne

d. Xe

What if the Earth was moved out to Jupiter's orbit which is about 5 times further from the Sun that Earth. How would the Sun's effect on the Earth change at that distance?

Calculate the ph of a solution formed by mixing 65 ml of 0.20 m nahco3 with 75 ml of 0.15 m na2co3.

In a chemical compound would you expect an oxide ion to be joined with one atom of calcium or one atom of potassium? why?

When might a large volume of material have little mass?

Which label belongs in the area marked X? A. Impact on growth and development B. Extinction C. Change in competition D. Loss of habitat

How many moles of H2O are there in1.0g of H20?

Which property of gases allows them to be stored at high concentrations in a bottle of air freshener? What changes occur at the molecular level when ice cream melts and forms a liquid?

a gas has a volume of 6 liters and a pressure of 1.5 atm. if the container is compressed to a volume of 2 liters, what will the pressure of the gas be?

When metals react with nonmetals, an ionic compound generally results. what is the predicted general formula?

Why could the Bohr model not predict line spectra for atoms other than hydrogen?