What differs between a radioactive isotope and a stable isotope?
a. radioactive isotopes last longer.
b. radioactive isotopes last for less time.
c. stable isotopes are shorter.
d. there is no difference.

What happens when an atom of sulfur combines with two atoms of chlorine to produce sci2? a. each chlorine atom shares a pair of electrons with the sulfur atom. b. an electron is transferred from each chlorine atom to the sulfur atom. c. an electron is transferred from the sulfur atom to each chlorine atom. d. each chlorine atom shares all its valence electrons with the sulfur atom.

Use the periodic table to complete this equation that represents nuclear fission processesun - ba c 3 n

What effect would average population growth have on land usage? a. urban use of land would rise to more than 30 percent of available land. b. industrial use of land would rise to more than 30 percent of available land. c. the percentage of available land used as cropland would stay the same. d. cropland would fall to about 10 percent of available land.