Question

what are valence electrons

Answer 1

Valence electrons → A valence electron is an outer shell electron that es associated with an atom and that can participate in the formation of chemical bond of the outer shell is not closed → for a main group element, a valence electron can exust only in the outermost electron shell 3 in a transition metal, a Valence electron can also be in an inner Shell El Chu C: is?28ap (electronic configuration) inert autermost configuration shell configuration * hence have 4 valance electrons Of "He" An atom with a closed shell of valence eletrons tends to be chemically inert Ex: All noble gases have sipa combuga, Hence all are chemically inext.

→ The no. of valence electrons of an element can be determined by the periodic table group an which element qs catagorized Group valence eos , nitrogen group 2 (11) 2 oxygen group 3-12 3-12 halogens (transition metals) boron group Noble gases Carbon group IB 4 - The no. of ees in an atom's outermost valence shell governs its bonding behavior. Therefore, elements whose atoms can have the same no. of valence @s are grouped together in the periodic table of elements outermost electronic configuration combiguration Element s-block p-block ns2 where n=2-7 ns npl -6 where n=2-6 (n-1) d1-10 n50-2 where n=4-7 (n-23 $ !="() dtons? where n= 6-7 d-block f-block fra Scanned with CamScanner