Where do most of the visible electromagnetic waves on Earth come from? Question 3 options:

x-rays

the sun

radio waves

florescent lights

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.

Which type of fossil does this image depict?

Tell me the iupac names of the following alcohols: