Significant figures are the digits that come after the first non-zero digit. The second value has 11 significant figures and is therefore the correct answer. However, the fourth answer has 4 significant figures and would also be a correct answer. So I don’t know if perhaps there has been a typo or a mistake in the question but with what you have provided here, both these answer have more than 2 significant figures.
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the atomic mass is the bottom number on the element.
-steel jelly
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Engineers have contribute to society in many ways like making the technology we use today or any type of power energy material
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