Question

define Doberciner's law of triads and give one
example​

Answer 1

Answer:

Dᴏʙᴇʀᴇɪɴᴇʀ ʟᴀᴡ ᴏғ ᴛʀɪᴀᴅs sᴛᴀᴛᴇs ᴛʜᴀᴛ ᴛʜᴇ ᴀᴠᴇʀᴀɢᴇ ᴏғ ᴛʜᴇ ᴀᴛᴏᴍɪᴄ ᴍᴀssᴇs ᴏғ ᴛʜᴇ ғɪʀsᴛ ᴀɴᴅ ᴛʜɪʀᴅ ᴇʟᴇᴍᴇɴᴛ ɪɴ ᴀ ᴛʀɪᴀᴅ ᴡɪʟʟ ʙᴇ ʀᴏᴜɢʜʟʏ ᴇϙᴜᴀʟ ᴛᴏ ᴛʜᴇ ᴀᴛᴏᴍɪᴄ ᴍᴀss ᴏғ ᴛʜᴇ sᴇᴄᴏɴᴅ ᴇʟᴇᴍᴇɴᴛ ɪɴ ᴛʜᴀᴛ ᴛʀɪᴀᴅ. ... Tʜʀᴇᴇ ᴍᴏʀᴇ ᴛʀɪᴀᴅs ᴡᴇʀᴇ ᴅᴇᴛᴇʀᴍɪɴᴇᴅ ɪɴ ᴛʜᴇ ʏᴇᴀʀ 1829. Fᴏʀ ᴇxᴀᴍᴘʟᴇ: Tʜᴇ ᴀᴛᴏᴍɪᴄ ᴍᴀss ᴏғ ᴄᴀʟᴄɪᴜᴍ ɪs 40ɢ/ᴍᴏʟ.

Answer 2

Answer:

Dobernier observed that if the elements are arranged in increasing order, the average of the atomic masses of the first and last element would be roughly the same of the atomic mass of middle element.

However he only recognised three triads

Lithium , Sodium and Potassium are one of the examples.

Explanation:

Caution: Example can be wrong.