Biology, 05.11.2019 18:31, payshencec21

Atomic weight
one of two or more atoms of the same element with different masses due to different numbers of neutrons
2. isotope
a horizontal row on the periodic table
3. period
something that repeats itself on a regular, predictable basis
4. periodic
the average relative mass of each element

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Atomic weight
one of two or more atoms of the same element with different masses due to diffe...