Question

9cw1
when an electron moves from a lower to a higher energy level, the electron
○ moves closer to the nucleus.
○ absorbs a continuously variable amount of energy.
○ always doubles its energy.
○ absorbs a quantum of energy.

Explanation:

• When an electron moves from a lower to a higher energy level, it needs to gain energy.
• According to quantum theory, electrons absorb energy in discrete amounts (quanta), not continuously variable amounts or always double.
• Moving to a higher energy level means moving farther from the nucleus, not closer.

Answer:

absorbs a quantum of energy.