A teacher would like to know if the smell of orange reduces stress in her AP Psychology students. During her first period class, students take their exams in the room as normal. During her second period class, the teacher uses a diffuser and orange-scented essential oil while the students take their test. She then compares the test scores of the two classes. Identify the following from this scenario:
Independent Variable:
Dependent variable:
Possibly Confounding Variable (s):

Explanation:

Translation:

Electrons in an atom are identified by four quantum numbers. Two electrons in one atom cannot have the same set of four quantum numbers.

This first quantum number is identified by the letter n and is named Principal quantum number. It can have only positive integer values: 1, 2,3, 4, 5, 6, 7, ...

Thus, the official name of the first quantum number is Principal quantum number.

The first quantum number indicates the main energy level which is related with the size of the orbitals: the larger the principal quantum number the farther the electron cloud is from the atomic nucleus. Thus, it is also used the name energy level to refer to the first quantum number.

Notice that the principal quantum number is also the number of the period of the element in the periodic table.