Done by: Sara Al-Khater 7D Science.  The element is a substance that is made out from one type of atoms.  element is a pure substance that cannot be.

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Presentation transcript:

Done by: Sara Al-Khater 7D Science

 The element is a substance that is made out from one type of atoms.  element is a pure substance that cannot be broken down into any simpler substances by chemical methods.  Some elements:  Iron (Fe)  Gold (Au)  Hydrogen (H)  Carbon (C)  Oxygen (O)  Helium (He)

 A compound is made up of two or more types of elements (e.g. water and carbon dioxide) that are chemically combined in a set ratio. They cannot be broken down into two or more simpler substances.  These are some compounds:  Water (H 2 O)  Carbon dioxide (CO 2 )  Ammonia (NH 3 )  Methane (CH 4 )  Glucose (C 6 H 12 O 6 )

 A mixture is what you get when you combine two substances in such a way that no chemical reaction occurs between the components and you can separate them again.  These are some mixtures:  sand and water  salt and water  sugar and salt

 The periodic table is a tabular display of the Chemical elements are organized configurations, and chemical properties. Elements are presented in increasing atomic number. The main body of the table grid is 18×7.