Which element is the lightest metal?

Discover the NOVA Hunting the Elements Test. Engage with interactive flashcards and multiple choice questions. Prepare effectively for your assessment!

Multiple Choice

Which element is the lightest metal?

Explanation:
The idea here is comparing density—the mass per unit volume of each metal. A metal with a lower density is lighter for the same volume. Among these options, lithium has the smallest density, about 0.53 g/cm^3 at room temperature, so it’s the lightest metal. Sodium, potassium, and magnesium all have higher densities (roughly 0.97, 0.86, and 1.74 g/cm^3, respectively), which means they’re heavier per volume than lithium. So lithium fits as the lightest metal in this set.

The idea here is comparing density—the mass per unit volume of each metal. A metal with a lower density is lighter for the same volume. Among these options, lithium has the smallest density, about 0.53 g/cm^3 at room temperature, so it’s the lightest metal. Sodium, potassium, and magnesium all have higher densities (roughly 0.97, 0.86, and 1.74 g/cm^3, respectively), which means they’re heavier per volume than lithium. So lithium fits as the lightest metal in this set.

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