mass of an atom is the sum of its nucleus
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Explanation:
For any given isotope, the sum of the numbers of protons and neutrons in the nucleus is called the mass number. This is because each proton and each neutron weigh one atomic mass unit (amu).
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ᴇʟʟᴏ ᴇʟʟᴏ.. ᴀᴘᴋᴀ ɴᴀᴀᴍ..??
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ᴍᴇʀᴀ ɴᴀᴀᴍ ᴠɪsʜ ʜᴇʜᴇ.. ❣️❣️(≚ᄌ≚)ℒℴѵℯ❤
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