What is the correct electron configuration for carbon?
a. 1s22s22p2
b. 1s22s22p4
c. 1s22s22p5
d. 1s22s22p63s23p2

What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?

The atomic number, or number, is the described as the number of in the nucleus of an chemical element.

How many grams of phosphorus are contained in 5.09 moles of phosphorus?