Question

define the atomic mass unit​

Answer 1

Explanation:

a unit of mass used to express atomic and molecular weights, equal to one twelfth of the mass of an atom of carbon-12.

Answer 2

ᴀ ᴜɴɪᴛ ᴏғ ᴍᴀss ᴜsᴇᴅ ᴛᴏ ᴇxᴘʀᴇss ᴀᴛᴏᴍɪᴄ ᴀɴᴅ ᴍᴏʟᴇᴄᴜʟᴀʀ ᴡᴇɪɢʜᴛs, ᴇǫᴜᴀʟ ᴛᴏ ᴏɴᴇ ᴛᴡᴇʟғᴛʜ ᴏғ ᴛʜᴇ ᴍᴀss ᴏғ ᴀɴ ᴀᴛᴏᴍ ᴏғ ᴄᴀʀʙᴏɴ-12.

hope it helps ✌️