Describe the Atom & Molecule   

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Atom is a basic buidling block of matter. This doesn't mean that there are no smaller particles than atom, but only atom is stable enough to exist on its own indepently or in a combination with other atoms in a molecul. This very nice video gives more detailed info on the topic of atoms. Then click the title, read more and do the quiz :-)

What is a molecul? A molecul would be a combination of different atoms in differen numbers and variations, bonded together. A good example for this is water with a chemical formula H2O, meaning the molecul of water is made of two atoms of hydrogen (H) and one atom of oxygen (O).



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by Rockstar (4.6k)  
Let's explore even more about atoms!

How were atoms first imagined, and how did our understanding of them change over time?

Where are the electrons...or can we even know?...

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