Question

What happens when an electron moves to a higher energy level?

it absorbs energy
it releases energy
it takes on a higher frequency
it takes on a lower frequency

Answer 1

it absorbs energy

Step-by-step explanation:

firstly, according to aufbau's princple"an electron will occupy an orbit with lower energy first before filling a higher energhy orbital" so in order for an electron to move to a higher orbital an electron needs energy in the form of photons.