Final pieces Introduced

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Presentation transcript:

Final pieces Introduced Chapter 1 Final pieces Introduced

Reactants: One or more starting materials Reactants: One or more starting materials. Between reactants, the “+” can be read as “reacts with.” Products: One or more substances formed as a result of a chemical reaction. Between products, the “+” can be read as “and.” Between products and reactants, the “” can be read as “to form.”

1.5 Chemical Elements and Symbols 114 elements have been discovered. 90 occur naturally. 24 are produced artificially.

Each element has its own unique symbol Each element has its own unique symbol. One or two letter symbols are used to represent elements. Memorize the first 56.

Chemical Formula: A notation for a chemical compound using symbols and subscripts to show how many atoms of each element are present. When no subscript is given for an element a subscript of “1” is understood.

1.6 The Periodic Table

Large amounts of information regarding the properties of elements are embedded in the periodic table. Elements are roughly divided into 3 groups: Metals: Found on the left side of the table. Nonmetals: Found on the right side of the table. Metalloids: Found along a diagonal line between metals and nonmetals.

End of Chapter 1