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Hello everyone, this is Jaime Rayo at Rayo's Corner and today we are going to learn what

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the matter is.

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As you may know, everything is made of matter.

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The smallest particle in matter is the atom.

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Scientists have found more than 100 types of different atoms.

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This one is represented by one or two letters.

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Oxygen with letter O, hydrogen with letter H, carbon with letter C, gold with letters

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A, U are examples of atoms.

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What do we have when different atoms join together?

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We have a molecule.

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A molecule is made when two or more different atoms join together.

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For example, two hydrogen atoms and one oxygen atom join together to make an H2O molecule,

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the water molecule.

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All these molecules together make substances.

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When all the molecules are the same, it is called pure substance.

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We have two types of pure substances.

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We have elements that are made from one type of atom and compounds that are made from one

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type of molecule.

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Gold is an example of element because it is only made from one type of atom, AU.

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On the other hand, we have the water, that it is a compound, why?

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the water is made only of one type of molecule but this molecule have two

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different types of atoms hydrogen and oxygen. That's all friends