Answer:
Carbon-14 is an isotope of carbon and differs in the number of neutrons in their nucleus.
Explanation:
all isotopes have the same number of protons and electrons, but differ in the number of neutrons. They have identical chemical behaviour but with different atomic masses and physical properties
The s sublevel has just one orbital, so can contain 2 electrons max. The p sublevel has 3 orbitals, so can contain 6 electrons max. The d sublevel has 5 orbitals, so can contain 10 electrons max. And the 4 sublevel has 7 orbitals, so can contain 14 electrons max.