Which is/are used in nuclear reactors to absorb neutrons? A. heavy nuclei

B. critical mass

C. chain reactions

D. control rods

Why is soap used to remove grease? a. its nonpolar end dissolves the grease. b. it makes the water bond with the grease. c. it chemically bonds with the grease. d. its polar end dissolves the grease.correct answer for apex - a, its nonpolar end dissolves the grease.

Tell me the iupac name of the following compounds:

Identify arrows pointing to bonding electrons. done h-0-0-h ) intro