How do you determine the valence electrons using the orbital diagram?

Answer 1

Group 1 - 1 valence electron

Group 2 - 2 valence electrons

Group 13 - 3 valence electrons

Group 14 - 4 valence electrons

Group 15 - 5 valence electrons

Group 16 - 6 valence electrons

Group 17 - 7 valence electrons

Group 18 - 8 valence electrons

Groups 3 - 12 technically have 2 valence electrons, but will also use d sublevel electrons as valence electrons as well. So their number of valence electrons vary (even for the same element) and require some memorization.

Answer 2

Determining the valence electron use electron arrangement method, arranging them into their shells

Shell 1: 2

Shell 2: 8

Shell 3: 16

Shell 4: 32

Note: until element 20, arrange the electron using only shell 1 n 2

eg. Calcium has 20 electrons

shell 1: 2

Shell 2: 8

Shell 3: 8

Shell 4: 2

so the valence shell is 2 and it has a Ca2+ charge.

Answer 3

To determine the valence electrons using the orbital diagram, count the number of electrons in the outermost energy level (shell) of the atom. Valence electrons are the electrons in the outermost shell and are important for an atom's reactivity and chemical bonding.

Answer 4

you round the Atomic Mass then subtract the atomic number