I know that for 1M is 1000mM and 1mM is 1000 micoM. But I can’t seem to comprehend it. Is 1M greater than mM? Is is it the other way around.
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In the metric system, a 10th of a unit has its own name. One meter, for example, is equal to 10 decimeter (dm). Meanwhile, 1 decimeter is equal to 10 centimeter (cm), and 1 centimeter is equal to 10 millimeter (mm). Naturally, this means that one meter is also equal to (10x10x10) 1000 millimeter.
For some units, we don’t often use steps of 10, but rather use steps of 1000. For length, commonly we use a term for 1000 meters: **Kilo**meter. (Kilo is derived from the greek ‘chilioi’, meaning “thousand”). In the other direction, as mentioned, the **milli**meter: one-thousandth of a meter (from the Latin ‘mille’, meaning one thousand). Similarly, one-thousanth of a millimeter is a **micro**meter. (From the Greek μικρός ‘mikrós’, meaning “small”.)
Mole works similar: One-thousandth of a mole is one **milli**mole, while one-thousandth of a millimole is one **micro**mole.
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