Electrons are located only in specific shells around the nucleus of the atom true false

What are the most explosive events that occur on the sun? umbras solar flares solar winds prominences

Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems

Need with these questions . need the answers in a rush for these questions are the answers i put down are correct or not? ?