Answer:
Explanation:
The principal quantum number is the quantum number denoted by n and which indirectly describes the size of the electron orbital. It is always assigned an integer value (e.g., n = 1, 2, 3...), but its value may never be 0. An orbital for which n = 2 is larger, for example, than an orbital for which n = 1.
Answer:
<em>Era</em> means the span of time define for the purposes of chronology and historiography.
Dear Yale,
Can you please give me a tour of the school. Can you tell me the classes, you are teaching.
