Question

at one time, scientists thought that electrons orbited an atoms nucleus in defined rings, like planets orbiting a star. now, scientists describe the location of electrons with electron clouds. what is an electron cloud? a. an area that repels the positively - charged nucleus b. a membrane that surrounds the atomic nucleus c. a region in which an electron will probably be

Explanation:

An electron cloud represents the area around the nucleus where an electron is likely to be found due to the probabilistic nature of electron - location in an atom. It is not a membrane and electrons are attracted to the positively - charged nucleus, not repelled.

Answer:

C. a region in which an electron will probably be