Question

how to find valence​

Answer 1

Valence electrons can be found by determining the electronic configurations of elements. Thereafter the number of electrons in the outermost shell gives the total number of valence electrons in that element.

★ᴘʟᴇᴀsᴇ ᴍᴀʀᴋ ᴀs ʙʀᴀɪɴʟɪᴇsᴛ ᴀɴsᴡᴇʀ ᴀɴᴅ ғᴏʟʟᴏᴡ ᴍᴇ !!

Answer 2

Answer:

If the number of electrons in the outer shell is between one to four, the compound is said to have positive valency. For compounds with electrons four, five, six, or seven, the valency is determined by subtracting the electron from eight. All noble gases except for Helium have eight electrons