Molecules and Compounds Notes

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Presentation transcript:

Molecules and Compounds Notes

There are only 92 kinds of atoms naturally found There are only 92 kinds of atoms naturally found. There are a lot more kinds of matter than this, so how does this happen? Elements combine together to make compounds. Most substances are compounds, not elements.

Elements vs. Compounds The difference is the number of elements that make up the substance.

Elements Elements are substances that are made of only one kind of atom. An example of an element is Na (sodium). Na is a metal that reacts violently with water. Another example is Au (gold). Au is a metal that is not very reactive, but very soft.

Compounds Compounds are substances that are made of multiple elements. An example of a compound is sugar- C6H12O6 It is made of three different elements, Carbon, Hydrogen, and Oxygen

Atoms vs. Molecules The difference is the number of atoms in the smallest possible piece of the substance.

Atoms Atom: the smallest possible piece of an element. Only one unbound atom.

Atoms

Molecules Molecules: Two or more atoms bound together. An example is O2. O2 has 2 O atoms bound together. Another example is CO. CO has one O atom and one C atom bound together

molecules

Which molecules are elements, not compounds?

Compounds

Sodium

ATP

Caffeine

Ibuprofen

`

Where are the atoms and molecules? Which are elements and compounds?

Get out your Lab notebook Then quietly work on your bell work and journal while I check your lab notebook off. If you finish early, get out your Making Molecules assignment and work quietly.

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