Amedeo Avogadro
Amedeo Avogadro was a really smart man who lived a long time ago. He figured out that if you have equal amounts of stuff (like air, water, or sugar), they will have the same number of tiny particles in them.
For example, if you have a cup of water and a cup of sugar, they might look really different, but they actually have the same number of tiny sugar and water particles in them. Amedeo called these tiny particles "atoms" and "molecules."
He came up with a special number, called Avogadro's number, to help us measure how many atoms or molecules are in a certain amount of stuff. This number is really huge - it's 6.02 x 10^23 - which means there are lots and lots of atoms and molecules in just a little bit of stuff!
Thanks to Amedeo Avogadro, we can understand how things are made up of tiny particles, and we can measure how many of those particles there are.
For example, if you have a cup of water and a cup of sugar, they might look really different, but they actually have the same number of tiny sugar and water particles in them. Amedeo called these tiny particles "atoms" and "molecules."
He came up with a special number, called Avogadro's number, to help us measure how many atoms or molecules are in a certain amount of stuff. This number is really huge - it's 6.02 x 10^23 - which means there are lots and lots of atoms and molecules in just a little bit of stuff!
Thanks to Amedeo Avogadro, we can understand how things are made up of tiny particles, and we can measure how many of those particles there are.