The student made a mistake on his diagram. Which mistake did he make? A
Ultraviolet light is used to communicate information through space.
B
Radio waves are used by food companies to sterilize produce.
Gamma waves are used in medicine to shrink problem cells.
D
Infrared radiation is used to create energy in nuclear reactors.

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

All cells are made of four types of acids, lipids, proteins, and carbohydrates.

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.