Question

What is mean by diagonal relationship?​

Answer 1

Answer:

A diagonal relationship is said to exist between certain pairs of diagonally adjacent elements in the second and third periods (first 20 elements) of the periodic table. ... Moving rightward across the period decreases the atomic radii of atoms, while moving down the group will increase the atomic radii.

Explanation:

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Answer 2

Required Answer:

➪ ᴀs ᴏʙsᴇʀᴠᴇᴅ ɪɴ ᴀʟᴋᴀʟɪ ᴍᴇᴛᴀʟs, ʙᴇʀɪʟʟɪᴜᴍ (ᴛʜᴇ ғɪʀsᴛ ᴍᴇᴍʙᴇʀ ᴏғ ɢʀᴏᴜᴘ 2) sʜᴏᴡs ᴀ ᴅɪᴀɢᴏɴᴀʟ ʀᴇʟᴀᴛɪᴏɴsʜɪᴘ ᴡɪᴛʜ ᴀʟᴜᴍɪɴɪᴜᴍ.

➪ ɪɴ ᴛʜɪs ᴄᴀsᴇ, ᴛʜᴇ sɪᴢᴇ ᴏғ ᴛʜᴇsᴇ ɪᴏɴs (r Be² = 2.36 and r Al³+ = 0.54/Å ) ɪs ɴᴏᴛ ᴀs ᴄʟᴏsᴇ.

➪ ʜᴏᴡᴇᴠᴇʀ,ᴛʜᴇɪʀ ᴄʜᴀʀɢᴇ ᴘᴇʀ ᴜɴɪᴛ ᴀʀᴇᴀ ɪs ᴄʟᴏsᴇʀ (Be²+ = 2.36 and Al³+ = 2.50).

➪ ᴛʜᴇʏ ᴀʟsᴏ ʜᴀᴠᴇ sᴀᴍᴇ ᴇʟᴇᴄᴛʀᴏɴᴇɢᴀᴛɪᴠɪᴛʏ ᴠᴀʟᴜᴇs (Be = 1.5; Al = 1.5)

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