Electron configuration and orbitals

Question 1

What is the maximum number of electrons in each shell?

Answer 1

Shell 1: 2 electrons
Shell 2: 8 electrons
Shell 3: 18 electrons
Shell 4: 32 electrons

Question 2

What is an orbital?

Answer 2

Is a region within an atom that can hold up to two electrons with opposite spins

Question 3

What is a subshell?

Answer 3

Is all of the orbitals of the same type in the same shell