6 - Chem1/6 20:33 , compounds. .

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Chem 1/6 20:33 Elements are types of atoms, and there are over 90 natural elements. An atom is the smallest piece of matter. When more than one different type of atom come together they create  compounds. A molecule is the simplest unit of a compound. Homogeneous has the same composition throughout. Heterogeneous are different in different places. 5.85x10>6 70400 4.09x10>-6 .000000000046
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Chem 1/20/10 20:33 How do compounds form? Ionic compounds form between metals and non-metals Properties of ionic compound o Brittle solids  o High melting points o Often water-soluble  o Conduct electricity in water Formed from ions What is an ion? An ion is a particle with charges A positive ion is called a cation A negitive ion is called a anion  Opposite charges attract Ionic compounds have no net charge they are neutral Polyatomic ions Polyatomic ions are clumps of atoms with a residual charge
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6 - Chem1/6 20:33 , compounds. .

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