Which energy level has the least energy?
n=1
n=3
n=5
n=7

n = 7

Explanation:

The Energy of a system decrease through the levels. Is simple to understand that:

1. All energy cames from sun.

2. Organisms that can absorve that energy acumulates X quantity. The more comum way to do that is the photosynthesis, which turns solar energy into glucose, basically. (Equation of photosynthesis: 6H2O + 6CO2 = C6H12O6 + 6O2)

3. The first heterotrofic organism eats a plant, for example. Then he gets a part of that energy, aproximately 0,3X - the efficiently variates for each organism, but it's low. For example, we need to took 30 Kcal to use 100 Kcal from a common protein. And we need to lose more energy for every process that we will do in our body. Remember, or now know, the second law of termodinamics: is impossible to fully convert the ceded energy into WORK in a open system.

4. The next organism eats the first, getting a part of his energy. 0,3 x 0,3X

So, as this process repeats for all organisms, we can easily conclude that the last organism has the least energy.

did you mean: energy is defined ashyperactivitya caloric measurementthe ability to move matterthe ability to think and analyze this form of energy is called "energy in motion" or "energy of moving matter"potential energy kinetic energy electrical energy1 ptlights on a stage can be examples of all of the following forms of energy exceptelectrical energylight energythermal energysound energywhen one type of energy changes to another this is called energy energy is stored based on their position or shape this is called energy.kinetic potential sound electromagnetic