Which electron configuration represents an
atom of chlorine in an excited state?
(1) 2–8–7 (3) 2–8–6–1
(2) 2–8–8 (4) 2–8–7–1

1. list three scientific reasons cockroaches may fly.

Scientific evidence tells us that the cause of earths four season is the tilt of earth as it revolves around the sun. the student is instructed to illustrate this information in a science notebook. how will the student illiterate winter in the northern hemisphere?

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space