Question

1. look at the model. then, answer the question and choose the best answer. what would have to happen for an electron to go from a lower energy level to a higher energy level? the electron would have to lose energy. the electron would have to gain energy. the nucleus would have to gain energy. the nucleus would have to lose energy.

Explanation:

When an electron moves from a lower energy level to a higher energy level, it needs to absorb energy. This is because higher energy levels are farther from the nucleus and require more energy for the electron to occupy them. The formula \(\Delta E = kv\) (where \(\Delta E\) is the change in energy, \(k\) is a constant, and \(v\) is the frequency) also implies that energy is involved in the transition. Losing energy would cause the electron to move to a lower energy level (as shown in the model when moving from \(n = 3\) to \(n = 2\) or \(n = 1\)), and changes in the nucleus's energy are not relevant to the electron's energy - level transition in this context.

Answer:

The electron would have to gain energy.