Why do group 1 metals decrease in hardness down the group? :)
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♣ Qᴜᴇꜱᴛɪᴏɴ :
ᴡʜʏ ᴅᴏ ɢʀᴏᴜᴘ 1 ᴍᴇᴛᴀʟꜱ ᴅᴇᴄʀᴇᴀꜱᴇ ɪɴ ʜᴀʀᴅɴᴇꜱꜱ ᴅᴏᴡɴ ᴛʜᴇ ɢʀᴏᴜᴘ?
♣ ᴀɴꜱᴡᴇʀ :
- ᴛʜᴇ ʟᴀʀɢᴇʀ ᴍᴇᴛᴀʟ ɪᴏɴꜱ ᴏɴ ᴛʜᴇ ʀɪɢʜᴛ ʜᴀᴠᴇ ᴀ ʟᴏᴡᴇʀ ᴄʜᴀʀɢᴇ ᴅᴇɴꜱɪᴛʏ (ᴇꜰꜰᴇᴄᴛɪᴠᴇ ɴᴜᴄʟᴇᴀʀ ᴄʜᴀʀɢᴇ) ᴀɴᴅ ᴀʀᴇ ᴀᴛᴛʀᴀᴄᴛᴇᴅ ᴛᴏ ᴛʜᴇ 'ꜱᴇᴀ' ᴏꜰ ɴᴇɢᴀᴛɪᴠᴇ ᴇʟᴇᴄᴛʀᴏɴꜱ ʟᴇꜱꜱ ᴛʜᴀɴ ꜱᴍᴀʟʟᴇʀ ɪᴏɴꜱ. ᴛʜᴇ ʀᴇꜱᴜʟᴛ ᴏꜰ ᴛʜɪꜱ ᴡᴇᴀᴋᴇʀ ʙᴏɴᴅɪɴɢ ɪꜱ ᴀ ʀᴇᴅᴜᴄᴛɪᴏɴ ɪɴ ᴛʜᴇ ᴍᴇʟᴛɪɴɢ ᴘᴏɪɴᴛ ᴏꜰ ᴛʜᴇ ᴀʟᴋᴀʟɪ ᴍᴇᴛᴀʟꜱ ᴏɴ ᴅᴇꜱᴄᴇɴᴅɪɴɢ ᴛʜᴇ ɢʀᴏᴜᴘ ᴀɴᴅ ᴀʟꜱᴏ ᴀ ᴅᴇᴄʀᴇᴀꜱᴇ ɪɴ ᴛʜᴇ ʜᴀʀᴅɴᴇꜱꜱ.
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