Samples Of Real Things And Common Uses. Samples Of Real Things And Common Uses.

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Presentation transcript:

Samples Of Real Things And Common Uses

More Samples Of Elements And Common Uses

Atomic Number = number of protons in the nucleus (always a whole number) Atomic Mass = the mass of an average atom of an element Ion charge = electric charge that forms on an atom when it gains or loses an electron

Any electrically charged atom is called an ion An atom that has gained an electrons is a negative ion because the extra electrons make it negative An atom that has lost electrons is a positive ion because the loss of electrons removes negative charge Some elements have multiple ion charge These elements can form ions in more than one way

PATTERNS!!!! Elements on the left side of the table generally form positive ions. Elements on the right side, except for the last column, generally form negative ions. Elements that are in the same column often form ions with the same charge as other elements in that column.

More Patterns!!! What are other ways to organize elements on the periodic table of elements????

Periods & Families Periods = Horizontal rows (ACROSS) Numbered 1 to 7 Families = Vertical columns (DOWN) Numbered 1 to 18

4 well-know family groups The Alkali metals The Alkaline earth metals The halogens The noble gases

ACTIVITY TIME