Question

define Masley's periodic law
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Answer 1

Answer:

According to Moseley, similar properties recur periodically when elements are arranged according to increasing atomic number. ... Atomic numbers, not weights, determine the factor of chemical properties.

Answer 2

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$\pink{⎝⎝}$ᴍᴏsᴇʟᴇʏ's ʟᴀᴡ sᴛᴀᴛᴇs ᴛʜᴀᴛ ᴛʜᴇ sǫᴜᴀʀᴇ ʀᴏᴏᴛ ᴏғ ᴛʜᴇ ғʀᴇǫᴜᴇɴᴄʏ ᴏғ ᴛʜᴇ ᴇᴍɪᴛᴛᴇᴅ x-ʀᴀʏ ɪs ᴘʀᴏᴘᴏʀᴛɪᴏɴᴀʟ ᴛᴏ ᴛʜᴇ ᴀᴛᴏᴍɪᴄ ɴᴜᴍʙᴇʀ.

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★ᴜsɪɴɢ ᴛʜɪs ʟᴀᴡ ᴍᴏsᴇʟᴇʏ ᴀʀʀᴀɴɢᴇᴅ ᴋ ᴀɴᴅ ᴀʀ, ɴɪ ᴀɴᴅ ᴄᴏ ɪɴ ᴀ ᴘʀᴏᴘᴇʀ ᴡᴀʏ ɪɴ ᴍᴇɴᴅᴇʟᴇᴇᴠ's ᴘᴇʀɪᴏᴅɪᴄ ᴛᴀʙʟᴇ.

★ᴛʜɪs ʟᴀᴡ ᴡᴀs ʜᴇʟᴅ ᴛᴏ ᴛʜᴇ ᴅɪsᴄᴏᴠᴇʀʏ ᴏғ ᴍᴀɴʏ ɴᴇᴡ ᴇʟᴇᴍᴇɴᴛs ʟɪᴋᴇ ᴛᴄ (43), ᴘʀ (61), ʀʜ (45).

★ᴛʜᴇ ᴀᴛᴏᴍɪᴄ ɴᴜᴍʙᴇʀ ᴏғ ʀᴀʀᴇ ᴇᴀʀᴛʜ ʜᴀᴠᴇ ʙᴇᴇɴ ᴅᴇᴛᴇʀᴍɪɴᴇᴅ ʙʏ ᴛʜɪs ʟᴀᴡ.

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Hope its help uhh :)