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What is an isotope?
Isotope are atoms of the same elemant with the same number of protons but different number of neutrons for example : carbon-14.
What is the atomic mass?
Protons and neutrons
What is the atomic number?
Protons
What is the formula for relative atomic mass?
R.A.M= mass number x % abudance of its isotope + mass number x % abudance of its isotope / 100.
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electron configuration, as to how many electrons can go on each shell?
2,8,8,2
What is relative atomic mass?
The average atomic mass of the isotope of that element weighted to take into account the abudance of each isotope.