Question

why the elements present in the block d and f are called transition and inner transition elements??​

Answer 1

Answer:

☆ The d-block elements are also called transition elements because of forming a bridge between the chemically active elements of s-block and less active elements of 13th and 14th group of p-block.Since the last electron added to each element of this group is filled in f-orbital , these two series of elements are hence called the

inner transition elements.

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Answer 2

ᴛʜᴇ ᴠᴇʀy ɴᴀᴍᴇ 'ᴛʀᴀɴꜱɪᴛɪᴏɴ' ɢɪᴠᴇɴ ᴛᴏ ᴛʜᴇ ᴇʟᴇᴍᴇɴᴛꜱ ᴏꜰ ᴅ-ʙʟᴏᴄᴋ ɪꜱ ᴏɴʟy ʙᴇᴄᴀᴜꜱᴇ ᴏꜰ ᴛʜᴇɪʀ ᴩᴏꜱɪᴛɪᴏɴ ʙᴇᴛᴡᴇᴇɴ ꜱ– ᴀɴᴅ ᴩ– ʙʟᴏᴄᴋ ᴇʟᴇᴍᴇɴᴛꜱ. ᴛʜᴇ ᴅ–ᴏʀʙɪᴛᴀʟꜱ ᴏꜰ ᴛʜᴇ ᴩᴇɴᴜʟᴛɪᴍᴀᴛᴇ ᴇɴᴇʀɢy ʟᴇᴠᴇʟ ɪɴ ᴛʜᴇɪʀ ᴀᴛᴏᴍꜱ ʀᴇᴄᴇɪᴠᴇ ᴇʟᴇᴄᴛʀᴏɴꜱ ɢɪᴠɪɴɢ ʀɪꜱᴇ ᴛᴏ ᴛʜᴇ ᴛʜʀᴇᴇ ʀᴏᴡꜱ ᴏꜰ ᴛʜᴇ ᴛʀᴀɴꜱɪᴛɪᴏɴ ᴍᴇᴛᴀʟꜱ, ɪ.ᴇ., 3ᴅ, 4ᴅ ᴀɴᴅ 5ᴅ.ᴛʜᴇ ᴠᴇʀy ɴᴀᴍᴇ 'ᴛʀᴀɴꜱɪᴛɪᴏɴ' ɢɪᴠᴇɴ ᴛᴏ ᴛʜᴇ ᴇʟᴇᴍᴇɴᴛꜱ ᴏꜰ ᴅ-ʙʟᴏᴄᴋ ɪꜱ ᴏɴʟy ʙᴇᴄᴀᴜꜱᴇ ᴏꜰ ᴛʜᴇɪʀ ᴩᴏꜱɪᴛɪᴏɴ ʙᴇᴛᴡᴇᴇɴ ꜱ– ᴀɴᴅ ᴩ– ʙʟᴏᴄᴋ ᴇʟᴇᴍᴇɴᴛꜱ. ᴛʜᴇ ᴅ–ᴏʀʙɪᴛᴀʟꜱ ᴏꜰ ᴛʜᴇ ᴩᴇɴᴜʟᴛɪᴍᴀᴛᴇ ᴇɴᴇʀɢy ʟᴇᴠᴇʟ ɪɴ ᴛʜᴇɪʀ ᴀᴛᴏᴍꜱ ʀᴇᴄᴇɪᴠᴇ ᴇʟᴇᴄᴛʀᴏɴꜱ ɢɪᴠɪɴɢ ʀɪꜱᴇ ᴛᴏ ᴛʜᴇ ᴛʜʀᴇᴇ ʀᴏᴡꜱ ᴏꜰ ᴛʜᴇ ᴛʀᴀɴꜱɪᴛɪᴏɴ ᴍᴇᴛᴀʟꜱ, ɪ.ᴇ., 3ᴅ, 4ᴅ ᴀɴᴅ 5ᴅ.

ʜᴏᴩᴇ ɪᴛ ʜᴇʟᴩꜱ!! ;)