1.2 - elements, isotopes & relative atomic mass

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6 Terms

1
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what is an element?

a substance that contains only one type of atom that all have the same number of protons in their nucleus.

2
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what determines what type of atom an element has?

the number of protons

3
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what is an isotope?

atoms with the same number of protons but different number of neutrons

4
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what do different isotopes have?

different masses

5
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what is relative atomic mass?

an average mass is an average mass taking into account the different masses and amounts (abundances) of all the isotopes that make up the element

6
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what is the formula for relative atomic mass?

Sum of (isotope abundance x isotope mass) ÷ sum of abundances of all the isotopes