Question

6. An element
ents y
in a per
7. Name the element that has same number of electrons as that of K and Ci bere
8. Write down three elements that show Dobereiner's triad.
Four
respec​

Answer 1

Aɴsᴡᴇʀ:

7. Aʀɢᴏɴ ʜᴀs ᴛʜᴇ sᴀᴍᴇ ᴇʟᴇᴍᴇɴᴛs ᴀs ᴘᴏᴛᴀssɪᴜᴍ

ᴀɴᴅ ᴄᴀʟᴄɪᴜᴍ

8. chlorine-bromine-iodine, calcium-strontium-

calcium-strontium- barium, and sulfur-selenium-tellurium