The current model of the atom states that
a. electrons orbit the nucleus like planets orbit the sun.
b. protons orbit the nucleus like planets orbit the sun.
c. electrons and protons move randomly around a nucleus.
d. electrons travel as waves in the electron cloud that surrounds the nucleus.

b. protons orbit the nucleus like planets orbit the sun.

by drinking easy

very easy

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms