Question

$\huge{{ [heya]}}$




#MY QUESTION#

$\huge{how?? }$

$\huge{how \: can \: u \: say \: that \: dobereiner \: was \: the \: first \times \frac{to \: show \: the \: relationship \: between \: properties \: of \: }{an \: element \: and \: its \: atomic \: mass} }$


$<marquee >$



${ \huge { \boxed{ \boxed{ \boxed{divjot}}}}}$

Answer 1

Doberenier arranged elements in the form of triad ( 3 elements in a group) in such a way that the middle element of the triad had both atomic mass and properties roughly equal to the average of the other two elements of the triad. for example lithium (7) ,Na(23),k(39): =7+39/2 =23

Answer 2

ʜᴇyᴀ ᴅᴇᴀʀ!!!
_____________________!!!!


yᴇꜱ , ʙᴇᴄᴀᴜꜱᴇ ʜᴇ ᴀʀʀᴀɴɢᴇᴅ ᴛʜᴇ ᴩᴇʀɪᴏᴅɪᴄ ᴛᴀʙʟᴇ ᴀꜱ ᴛʀᴀɪᴅꜱ ɪɴ 1817.



ʜᴇ ɢʀᴏᴜᴩᴇᴅ ᴇʟᴇᴍᴇɴᴛ ɪɴ ᴛʜʀᴇᴇ ᴡɪᴛʜ ꜱɪᴍɪʟɪᴀʀ ᴩʀᴏᴩᴇʀᴛɪᴇꜱ ꜱᴜᴄʜ ᴛʜᴀᴛ ᴛʜᴇ ᴀᴛᴏᴍɪᴄ ᴡᴇɪɢʜᴛ ᴏꜰ ᴛʜᴇ ᴍɪᴅᴅʟᴇ ᴇʟᴇᴍᴇɴᴛ ᴡᴀꜱ ᴛʜᴇ ᴀʀᴛɢᴇᴍᴀᴛɪᴄ ᴍᴇᴀɴ ᴏꜰ ᴏᴛʜᴇʀ ᴛᴡᴏ.



ʙᴜᴛ , ʜɪꜱ ᴛʀᴀɪᴅ ᴄʟᴀꜱꜱɪꜰɪᴄᴀᴛɪᴏɴ ᴡᴀꜱ ʀᴇᴊᴇᴄᴛᴇᴅ ᴀꜱ ..


❌ qᴜɪᴛᴇ ᴀ ɴᴜᴍʙᴇʀ ᴏꜰ ᴇʟᴇᴍᴇɴᴛꜱ ᴄᴀɴ ɴᴏᴛ ʙe ɢʀᴏᴜᴩᴇᴅ .❌