Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

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sulfur belongs to group 16 because it can be found in nature whether it is in a free or combined state.

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the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.