Question

what is the usual number of valence electrons and valency of group 18 elements of the periodic table?​

Answer 1

Answer:

8

The usual number of valence electrons of group 18 elements is 8. Therefore, the valency of the group 18 elements is: 8-8=0.

Explanation:

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Answer 2

‎‎ ‎ ‎ ‎ ‎‎ ‎ ‎ ‎ ‎  ‎ ‎‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎‎ 8

Tʜᴇ ᴜsᴜᴀʟ ɴᴜᴍʙᴇʀ ᴏғ ᴠᴀʟᴇɴᴄᴇ ᴇʟᴇᴄᴛʀᴏɴs ᴏғ ɢʀᴏᴜᴘ 18 ᴇʟᴇᴍᴇɴᴛs ɪs 8. Tʜᴇʀᴇғᴏʀᴇ, ᴛʜᴇ ᴠᴀʟᴇɴᴄʏ ᴏғ ᴛʜᴇ ɢʀᴏᴜᴘ 18 ᴇʟᴇᴍᴇɴᴛs ɪs: 8-8=0.

➡️ (ᴀ) Tʜᴇ ᴜsᴜᴀʟ ɴᴜᴍʙᴇʀ ᴏғ ᴠᴀʟᴇɴᴄᴇ ᴇʟᴇᴄᴛʀᴏɴs ɪs 8 ᴀɴᴅ ᴠᴀʟᴇɴᴄʏ ɪs 0 (ᴢᴇʀᴏ). 

➡️ (ʙ) Tʜᴇ ɴᴜᴍʙᴇʀ ᴏғ ᴠᴀʟᴇɴᴄᴇ ᴇʟᴇᴄᴛʀᴏɴs ʀᴇᴍᴀɪɴs ᴛʜᴇ sᴀᴍᴇ ᴀs ᴡᴇ ɢᴏ ᴅᴏᴡɴ ɪɴ ɢʀᴏᴜᴘ ᴏғ ᴛʜᴇ ᴘᴇʀɪᴏᴅɪᴄ ᴛᴀʙʟᴇ.

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