10 terms

Isotope Practice Quiz

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Isotopes of the same elements must have the same number of __________
Protons
Isotopes of the same element must have different number of __________
Neutrons
A number that follows their name or symbol identifies different isotopes (example C-12 or c-12). What is this number called?
Mass Number
For a neutral (uncharged) element, the number of electrons is equal to the -----?
Number of protons
How many protons are in an atom Sr-86?
38
How many neutrons are in an atom of Sr-86?
86-38 = 48
How many electrons are in an (uncharged) atom of Sr-86?
38
How many protons are in an atom of Sr-88?
38
How many neutrons are in an atom of Sr-88?
88-38=50
How many electrons (uncharged) atom of Sr-88?
38