5. Calcium-40 and Calcium-42 both share the same number of protons
number of neutrons
number of electrons
mass number

Which of the following elements is a representative element? a. chromium (cr) b. aluminum (al) c. mercury (hg) d. silver (ag)

How can you use chemical equations to predict the products of the reaction you can carry out?

The peak wavelength for the blackbody curve of a star is in the uv range. assuming the radiation from this star can reach earth, would you be able to see it?