Which statements are true about ionic compounds? a. an ionic compound can be named using prefixes. b. an ionic compound is made of a positive cation and a negative anion. c. an ionic compound of two elements has three possible formulas. d. an ionic compound is made of a nonmetal and a metal.

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.

c) up

hope this

false.

explanation:

this statement is false. after falling for 5 seconds, its speed will not be 100 m/s.

no. bullets are macro objects. wave nature is for light waves, extremely tiny particles. if a light particle was the size of your finger, the bullet would be the size of the universe. so basically, that huge difference in size makes the wave nature of matter insignificant.