Question

mandeleeff's periodic table periodic law, achievements & limitations​

Answer 1

ᴍᴇɴᴅᴇʟᴇᴇᴠ's ᴘᴇʀɪᴏᴅɪᴄ ᴛᴀʙʟᴇ:

ᴍᴇɴᴅᴇʟᴇᴇᴠ ᴡᴀs ᴀ ʀᴜssɪᴀɴ sᴄɪᴇɴᴛɪsᴛ. ᴍᴇɴᴅᴇʟᴇᴇᴠ ᴀʀʀᴀɴɢᴇᴅ ᴛʜᴇ ᴘᴇʀɪᴏᴅɪᴄ ᴛᴀʙʟᴇ ɪɴ ᴅɪғғᴇʀᴇɴᴛ-ᴅɪғғᴇʀᴇɴᴛ ᴡᴀʏs. ʙᴜᴛ ʜᴇ sᴜᴄᴄᴇᴇᴅ ᴡʜᴇɴ ʜᴇ ᴀʀʀᴀɴɢᴇ ᴀʟʟ ᴛʜᴇ ᴛʜᴇɴ ᴋɴᴏᴡɴ ᴇʟᴇᴍᴇɴᴛs ɪɴ ᴛʜᴇ ᴏʀᴅᴇʀ ᴏғ ɪɴᴄʀᴇᴀsɪɴɢ ᴀᴛᴏᴍɪᴄ ᴍᴀss. ᴛʜᴇ ʙᴇɴᴇғɪᴛs ᴏғ ᴅᴏɪɴɢ sᴏ ɪs, ᴛʜᴏsᴇ ᴇʟᴇᴍᴇɴᴛs ʜᴀᴠɪɴɢ ᴛʜᴇ sɪᴍɪʟᴀʀ ᴘʀᴏᴘᴇʀᴛɪᴇs ᴄᴏᴍᴇs ᴜɴᴅᴇʀ ᴛʜᴇ ᴠᴇʀᴛɪᴄᴀʟ ʟɪɴᴇ ᴏғ ᴛʜᴏsᴇ ᴇʟᴇᴍᴇɴᴛs ᴡʜɪᴄʜ ᴀʀʀᴀɴɢᴇᴅ ɪɴ ʜᴏʀɪᴢᴏɴᴛᴀʟ ʟɪɴᴇ. ʙᴜᴛ ᴍᴇɴᴅᴇʟᴇᴇᴠ sᴜʀᴇ ᴛʜᴀᴛ ᴛʜᴇ ᴇʟᴇᴍᴇɴᴛs ʜᴀᴠɪɴɢ ᴛʜᴇ sᴀᴍᴇ ᴘʀᴏᴘᴇʀᴛɪᴇs ғᴇʟʟ ɪɴ sᴀᴍᴇ ᴠᴇʀᴛɪᴄᴀʟ ᴄᴏʟᴜᴍɴ ᴏʀ ɢʀᴏᴜᴘ. sᴏ ᴛʜᴀᴛ's ᴡʜʏ ᴍᴇɴᴅᴇʟᴇᴇᴠ ʟᴇғᴛ sᴏᴍᴇ ɢᴀᴘ ɪɴ ʜɪs ᴘᴇʀɪᴏᴅɪᴄ ᴛᴀʙʟᴇ.

• ɪɴᴄʀᴇᴀsɪɴɢ ᴀᴛᴏᴍɪᴄ ᴍᴀss
• ɢʀᴏᴜᴘɪɴɢ ɪɴ ʜᴏʀɪᴢᴏɴᴛᴀʟ ᴀɴᴅ ᴠᴇʀᴛɪᴄᴀʟ ʟɪɴᴇ ᴏғ ᴀʟʟ ᴛʜᴇ ᴇʟᴇᴍᴇɴᴛs ʜᴀᴠɪɴɢ sɪᴍɪʟᴀʀ ᴘʀᴏᴘᴇʀᴛɪᴇs.

ʙᴜᴛ ᴛʜᴇʀᴇ ᴀʀᴇ ʟɪᴍɪᴛᴀᴛɪᴏɴs ᴀɴᴅ ᴀᴄʜɪᴇᴠᴇᴍᴇɴᴛs ᴏғ ᴍᴇɴᴅᴇʟᴇᴇᴠ's ᴘᴇʀɪᴏᴅɪᴄ ᴛᴀʙʟᴇ. ғᴏʟʟᴏᴡɪɴɢ ᴀʀᴇ ᴛʜᴇ ᴛʜʀᴇᴇ ᴍᴀɪɴ ᴀᴄʜɪᴇᴠᴇᴍᴇɴᴛs ᴏғ ᴍᴇɴᴅᴇʟᴇᴇᴠ's ᴘᴇʀɪᴏᴅɪᴄ ᴛᴀʙʟᴇ.

ᴀᴄʜɪᴇᴠᴇᴍᴇɴᴛ ᴏғ ᴍᴇɴᴅᴇʟᴇᴇᴠ's ᴘᴇʀɪᴏᴅɪᴄ ᴛᴀʙʟᴇ:

ᴍᴇɴᴅᴇʟᴇᴇᴠ ᴘᴇʀɪᴏᴅɪᴄ ᴛᴀʙʟᴇ ʜᴇʟᴘs ᴛᴏ ᴜɴᴅᴇʀsᴛᴀɴᴅ ᴛʜᴇ ᴘʀᴏᴘᴇʀᴛɪᴇs ᴏғ ᴛʜᴇ ᴇʟᴇᴍᴇɴᴛs. ᴍᴇᴀɴs ᴍᴀɴʏ ᴏғ ᴛʜᴇ ᴇʟᴇᴍᴇɴᴛs ʜᴀᴠɪɴɢ sᴀᴍᴇ ᴘʀᴏᴘᴇʀᴛɪᴇs ʜᴀs ᴏɴʟʏ ᴇxᴘʟᴀɪɴs ᴡɪᴛʜ ᴛʜᴇ ʜᴇʟᴘ ᴏғ ᴍᴇɴᴅᴇʟᴇᴇᴠ ᴘᴇʀɪᴏᴅɪᴄ ᴛᴀʙʟᴇ. ғɪʀsᴛ ᴀᴄʜɪᴇᴠᴇᴍᴇɴᴛ ᴏғ ᴍᴇɴᴅᴇʟᴇᴇᴠ ɪs ʜᴇ ᴘʀᴇᴅɪᴄᴛᴇᴅ ᴛʜᴇ ᴇxɪsᴛᴇɴᴄᴇ ᴏғ sᴏᴍᴇ ᴇʟᴇᴍᴇɴᴛs ᴛʜᴀᴛ ᴡᴀs ɴᴏᴛ ᴅɪsᴄᴏᴠᴇʀᴇᴅ ᴀᴛ ᴛʜᴀᴛ ᴛɪᴍᴇ. ᴍᴇɴᴅᴇʟᴇᴇᴠ ʟᴇғᴛ sᴏᴍᴇ ɢᴀᴘ ᴏғ ᴜɴᴅɪsᴄᴏᴠᴇʀᴇᴅ ᴇʟᴇᴍᴇɴᴛs ɪɴ ʜɪs ᴘᴇʀɪᴏᴅɪᴄ ᴛᴀʙʟᴇ. ᴀɴᴅ ᴡʜᴇɴ ᴛʜᴏsᴇ ᴇʟᴇᴍᴇɴᴛs ᴡᴇʀᴇ ᴅɪsᴄᴏᴠᴇʀᴇᴅ ʟᴀᴛᴇʀ, ɪᴛ ᴡᴀs ᴘʟᴀᴄᴇᴅ ᴏɴ ᴛʜᴏsᴇ ɢᴀᴘs ᴡɪᴛʜᴏᴜᴛ ᴅɪsᴛᴜʀʙɪɴɢ ᴛʜᴇ ᴇxɪsᴛɪɴɢ ᴇʟᴇᴍᴇɴᴛs. ᴍᴇɴᴅᴇʟᴇᴇᴠ ᴘʀᴇᴅɪᴄᴛᴇᴅ ᴛʜᴇ ᴘʀᴇғɪx ɴᴀᴍᴇ (ɪɴ sᴀɴsᴋʀɪᴛ) ᴏғ ᴜɴᴅɪsᴄᴏᴠᴇʀᴇᴅ ᴇʟᴇᴍᴇɴᴛs ᴀs sᴀᴍᴇ ᴡʜᴇɴ ɪᴛ ᴡᴀs ᴅɪsᴄᴏᴠᴇʀᴇᴅ ʟᴀᴛᴇʀ. (ᴡʜɪᴄʜ ɪs ɢᴀʟʟɪᴜᴍ, ɢᴇʀᴍᴀɴɪᴜᴍ, ᴀɴᴅ sᴄᴀɴᴅɪᴜᴍ). ᴍᴇɴᴅᴇʟᴇᴇᴠ's ᴘᴇʀɪᴏᴅɪᴄ ᴛᴀʙʟᴇ ᴘʀᴇᴅɪᴄᴛs ᴛʜᴇ ᴘʀᴏᴘᴇʀᴛɪᴇs ᴏғ sᴇᴠᴇʀᴀʟ ᴇʟᴇᴍᴇɴᴛs ᴏɴ ᴛʜᴇ ʙᴀsɪs ᴏғ ᴛʜᴇɪʀ ᴘᴏsɪᴛɪᴏɴ ʙᴜᴛ ᴀᴛ ᴛʜᴀᴛ ᴛɪᴍᴇ ɢᴀʟʟɪᴜᴍ, sᴄᴀɴᴅɪᴜᴍ ᴀɴᴅ ɢᴇʀᴍᴀɴɪᴜᴍ ᴡᴇʀᴇ ɴᴏᴛ ᴅɪsᴄᴏᴠᴇʀᴇᴅ. ᴇᴠᴇɴ ɪᴛ ᴡᴀs ғᴏᴜɴᴅ ᴛᴏ ʙᴇ ᴀʟᴍᴏsᴛ sᴀᴍᴇ ᴀs ᴛʜᴇ ᴀᴄᴛᴜᴀʟ ᴘʀᴏᴘᴇʀᴛɪᴇs ᴡʜᴇɴ ᴛʜᴇsᴇ ᴇʟᴇᴍᴇɴᴛs ᴡᴇʀᴇ ᴅɪsᴄᴏᴠᴇʀᴇᴅ. ᴡʜᴇɴ ɴᴏʙʟᴇ ɢᴀs ᴡᴇʀᴇ ᴅɪsᴄᴏᴠᴇʀᴇᴅ, ɪᴛ ɢᴏᴛ ᴀ ᴘʟᴀᴄᴇ ɪɴ ᴍᴇɴᴅᴇʟᴇᴇᴠ's ᴘᴇʀɪᴏᴅɪᴄ ᴛᴀʙʟᴇ ᴡɪᴛʜᴏᴜᴛ ᴅɪsᴛᴜʀʙɪɴɢ ᴛʜᴇ ᴇxɪsᴛɪɴɢ ᴇʟᴇᴍᴇɴᴛs.

ʟɪᴍɪᴛᴀᴛɪᴏɴs ᴏғ ᴍᴇɴᴅᴇʟᴇᴇᴠ's ᴘᴇʀɪᴏᴅɪᴄ ᴛᴀʙʟᴇ:

ᴍᴇɴᴅᴇʟᴇᴇᴠ's ᴄᴏᴜʟᴅ ɴᴏᴛ ᴀʙʟᴇ ᴛᴏ ᴇxᴘʟᴀɪɴ ᴛʜᴇ ᴘᴏsɪᴛɪᴏɴs ᴏғ ᴛʜᴇ ɪsᴏᴛᴏᴘᴇs ɪɴ ᴘᴇʀɪᴏᴅɪᴄ ᴛᴀʙʟᴇ. ᴍᴇɴᴅᴇʟᴇᴇᴠ ᴀʀʀᴀɴɢᴇᴅ ᴛʜᴇ ᴇʟᴇᴍᴇɴᴛs ɪɴ ᴛʜᴇ ᴏʀᴅᴇʀ ᴏғ ɪɴᴄʀᴇᴀsɪɴɢ ᴀᴛᴏᴍɪᴄ ᴍᴀss. ʙᴜᴛ ɪɴ sᴏᴍᴇ ᴄᴀsᴇs ɪᴛ ᴡᴀs ғᴏᴜɴᴅ ᴛʜᴀᴛ ᴛʜᴇ ᴇʟᴇᴍᴇɴᴛs ʜᴀᴠɪɴɢ ʜɪɢʜᴇʀ ᴀᴛᴏᴍɪᴄ ᴍᴀss ᴄᴏᴍᴇs ғɪʀsᴛ ᴛʜᴀɴ ᴛʜᴇ ʟᴏᴡᴇʀ ᴀᴛᴏᴍɪᴄ ᴍᴀss ᴇʟᴇᴍᴇɴᴛ. sᴏᴍᴇ ᴏғ ᴛʜᴇ ᴇʟᴇᴍᴇɴᴛs ʜᴀᴠᴇ ᴛᴡᴏ ᴀᴛᴏᴍɪᴄ ᴍᴀss ᴀɴᴅ ɪғ ᴡᴇ ᴀʀʀᴀɴɢᴇᴅ ɪᴛ ɪɴ ᴍᴇɴᴅᴇʟᴇᴇᴠ's ᴘᴇʀɪᴏᴅɪᴄ ʟᴀᴡ ʜᴇɴ ᴛᴡᴏ ᴇʟᴇᴍᴇɴᴛs ᴄᴏᴍᴇs ɪɴ ᴏɴᴇ ʙᴏx ᴡʜɪᴄʜ ᴡᴀs ɴᴏᴛ ᴇxᴘʟᴀɪɴᴇᴅ. ᴍᴇɴᴅᴇʟᴇᴇᴠ ᴅɪᴅɴ'ᴛ ᴀssɪɢɴᴇᴅ ᴛʜᴇ ᴄᴏʀʀᴇᴄᴛ ᴘᴏsɪᴛɪᴏɴ ᴏғ ᴛʜᴇ ʜʏᴅʀᴏɢᴇɴ ᴇʟᴇᴍᴇɴᴛ ɪɴ ʜɪs ᴘᴇʀɪᴏᴅɪᴄ ᴛᴀʙʟᴇ. ʜʏᴅʀᴏɢᴇɴ ᴇʟᴇᴍᴇɴᴛ ᴄᴏᴜʟᴅ ʙᴇ ᴘʟᴀᴄᴇᴅ ɪɴ ʙᴏᴛʜ ᴀʟᴋᴀʟɪ ɢʀᴏᴜᴘ ᴀs ᴡᴇʟʟ ᴀs ʜᴀʟᴏɢᴇɴ ɢʀᴏᴜᴘ ʙᴜᴛ ᴍᴇɴᴅᴇʟᴇᴇᴠ's ᴘᴇʀɪᴏᴅɪᴄ ʟᴀᴡ ᴅɪᴅɴ'ᴛ ᴀssɪɢɴ ᴛʜᴇ ᴄᴏʀʀᴇᴄᴛ ᴘᴏsɪᴛɪᴏɴ ᴏғ ʜʏᴅʀᴏɢᴇɴ ᴇʟᴇᴍᴇɴᴛ.

Answer 2

Answer:

mandeleeff's periodic table periodic law achievements