What is the relationship between valence electrons and the group number?

Answer 1

The valence electron number is equal to the group number for all Group A elements, ie. columns IA, IIA....VIIIA.
This is not true for the transition metals, and they are usually Group B designation

Answer 2

in case you got here upon a periodic table with the communities categorized via Roman numerals (or at times Arabic numerals) and a letter A or B, then for all yet team VIII (at times VIIIB), the Fe, Ni, Co communities, the Roman numeral TELLS you the form of valence electrons. no longer so with the hot IUPAC numbering device of a million-18. yet you are able to anticipate via subtracting 10 from the numbers eleven-18. lower back, the team numbers for the Fe, Ni and Co communities enable you already know no longer something. =========== shop on with up ============ UMB is off the chart somewhat. The inert gases, that are cutting-edge in team VIIIA, DO certainly have valence electrons, and that they have got 8 of them, purely because of the fact the Roman numeral tells you. The 8 valence electrons are got here upon in the s-sublevel and the crammed p-sublevel for each inert gasoline, different than He, for sure, which has a crammed s-sublevel purely.

Answer 3

in groups 1 there is 1 valence electron
group 2 there is 2 valence electrons
in groups 3-10 subtract 2 from the group number
in groups 11-18 subtract 10 from the group number

Answer 4

hi