Question

The electronic configuration of an element T is 2, 8, 7.
(1)
What is the group number of T?
What is the period number of T?
(iii) How many valence electrons are there in an atom of T?
(iv) What is the valency of T?
(v) Is it a metal or a non-metal?​

Answer 1

Answer:

group 17

period 3

7

-1

non metal

Explanation:

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Answer 2

Answer:

❗❗❗* ᴜʀɢᴇɴᴛ *❗❗ ❗

ᴛʜᴇ ᴀʀᴍʏ ꜰᴀɴᴅᴏᴍ ɪꜱ ᴅᴇꜱᴛʀᴏʏɪɴɢ ɪᴛꜱᴇʟꜰ.

ʙᴛꜱ ᴡᴀꜱ ɴᴏᴍɪɴᴀᴛᴇᴅ ꜰᴏʀ ᴀ ɢʀᴀᴍᴍʏ ꜰᴏʀ ᴅʏɴᴀᴍɪᴛᴇ

ʙᴜᴛ ᴛʜᴇʀᴇ ɪꜱ ᴠᴇʀʏ ʟɪᴛᴛʟᴇ ʟᴇꜰᴛ ꜰᴏʀ ᴛʜᴇᴍ ᴛᴏ ᴇʟɪᴍɪɴᴀᴛᴇ ᴡʜᴀᴛ ᴀʙᴏᴜᴛ ᴀʀᴍʏ?

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