How do atoms form? A physicist explains where the atoms that make up everything around come from

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to ...
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Lesson 3.2: Finding Volume—The Water Displacement Method

Accompanying Lesson Plan: Lesson 3.2: Finding Volume—The Water Displacement Method The chart shows that atomic size and mass for the first 20 elements in the periodic table. The size of the atoms and ...
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Lesson 3.1: What is Density?

Copper atoms are larger than aluminum atoms. There are fewer copper atoms than aluminum atoms in the cubes. Copper atoms are much more massive than aluminum atoms. The extra mass makes copper more ...

A 'seating chart' for atoms helps locate their positions in materials

If you think of a single atom as a grain of sand, then a wavelength of visible light—which is a thousand times larger than ...