Calcium Valence Electrons
Why calcium has 2
Calcium has 20 electrons, arranged as 1s2 2s2 2p6 3s2 3p6 4s2. The highest shell is n = 4, holding 4s2, so 2.
Calcium is in group 2, and groups 1 and 2 have as many valence electrons as their group number.
What that means for bonding
As a metal, calcium tends to lose valence electrons rather than gain them, forming Ca2+ ions.
Electrons per shell: 2, 8, 8, 2. See the calcium electron configuration and orbital diagram or the full calcium data sheet.
Same group, same count
Calcium valence electrons FAQ
How many valence electrons does calcium have?
Calcium has 2 valence electrons. Its electron configuration is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s², and the outermost shell (n = 4) holds 4s².
How do you find the valence electrons of calcium?
Calcium is in group 2, and groups 1 and 2 have as many valence electrons as their group number.
How many bonds does calcium form?
As a metal, calcium tends to lose valence electrons rather than gain them, forming Ca2+ ions.
What is the Lewis dot structure of calcium?
The symbol Ca with 2 dots around it, one per valence electron, placed singly on each side before any side is paired.
How many core electrons does calcium have?
18: 20 electrons in total minus the 2 valence electrons.