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0GEEK0
To calculate the atomic mass of a single atom of an element, add up the mass of protons and neutrons. Example: Find the atomic mass of an isotope of carbon that has 7 neutrons. You can see from the periodic table that carbon has an atomic number of 6, which is its number of protons.

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kevindulskij

Explanation:

start by finding the atomic number of the element which is the number above the element on the perodic table . Next , find the number of neutrons in the nucleus by subtracting the atomic number from the istope number . Finally , add the atomic number of neutrons to get the atomic mass.

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