Valence Electrons Calculator
⚛ Atomic & Quantum. Use the Valence electrons (main groups) formula to find valence electrons, group: pick the value you want, type the others, and the answer updates as you go.
Groups 1–2: the group number. Groups 13–18: group number − 10.
Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.
What each letter means
| Quantity | Unit |
|---|---|
| Valence electrons | no unit |
| Group | no unit |
Worked example
Find the valence electrons when Group = 14.
Using Nvalence = cases G & G ≤ 2 \ G - 10 & G ≥ 13 cases: Valence electrons = 4.
Frequently asked questions
What is the formula for Valence electrons (main groups)?
Nvalence = cases G & G ≤ 2 \ G - 10 & G ≥ 13 cases. Groups 1–2: the group number. Groups 13–18: group number − 10.
What do the letters stand for, and what units are used?
Valence electrons, Group.
How do you calculate valence electrons?
Put the values into Nvalence = cases G & G ≤ 2 \ G - 10 & G ≥ 13 cases. For example, with Group = 14, valence electrons = 4.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (valence electrons, group) and fill in the others: it rearranges the formula for you.
