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what is the mass number of iron with 19 neutrons?​

Sagot :

Answer:

Explanation:

The mass number of iron is 55.845amu. The mass number is equal to the number of protons added to he number of neutrons in an atom. Each neutron or proton has a mass of about 1amu.Thus we say 55.84500 atomic mass units * 19 =

1 061.055 atomic mass units

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