What kind of weather periods are usually followed by cholera and malaria outbreaks? a. excessive rain and cold b. moderate temperatures with low moisture c. excessive rain and heat d. extreme dry heat

How many protons, electrons, and neutrons are in each of the following isotopes? a. zirconium-90 b. palladium-108 c. bromine-81 d. antimony-123

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.

In which block of the periodic table is uranium (u) found? s blockd blockp blockf block