Which element has a lower ionization energy: Ca or Ra? Why?

3. if the dartboard below is used to model an atom, which subatomic particles would be located at z?

Which feature do highland climates have that lower elevation areas do not?

Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.