MacRoscopic Properties: The World We See

Phases of Matter and Intensive Properties

What are the basic units of length?

Almost every length scale used in science is based on the meter. Chemistry frequently deals with very small lengths, so while you’re probably familiar with millimeters (10−3 m), it’s hard to have an intuitive sense about just how small a nanometer (10−9 m) is. There’s another length scale commonly used when talking about chemical bonds—the Ångström. An Ångström (Å) is one ten-billionth of a meter (10−10 m). The lengths of chemical bonds vary depending on the elements and other factors, but are usually around 1–2 Å.


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