c4- chemical calculations Flashcards

1
Q

what is the number at the top of an element

A

mass number=protons and neutrons

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2
Q

what is the number at the bottom of an element called

A

atomic number=protons/electrons

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3
Q

what is the Ar(relative atomic mass) of an element

A

average mass of all the isotopes of that particular element

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4
Q

what is the relative formula mass (Mr)

A
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