Periodic Table of Elements I am Dmitri Mendeleev! I made the PERIODIC TABLE !

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Presentation transcript:

Periodic Table of Elements

I am Dmitri Mendeleev! I made the PERIODIC TABLE !

What is the PERIODIC TABLE? o Shows all known elements in the universe. o Organizes the elements by chemical properties.

Elements Science has come a long way since Aristotle’s theory of Air, Water, Fire, and Earth. Scientists have identified 90 naturally occurring elements, and created about 28 others.

Elements The elements, alone or in combinations, make up our bodies, our world, our sun, and in fact, the entire universe.

Periodic Table The periodic table organizes the elements in a particular way. A great deal of information about an element can be gathered from its position in the period table. For example, you can predict with reasonably good accuracy the physical and chemical properties of the element. You can also predict what other elements a particular element will react with chemically. Understanding the organization and plan of the periodic table will help you obtain basic information about each of the 118 known elements.

METALS NONMETALS METALLOIDS

PROPERTIES OF METALS Metals are good CONDUCTORS of AND electricity heat

Metals are SHINY.

Metals are DUCTILE (can be stretched into thin wires).

Metals are MALLEABLE (Capable of being shaped as by hammering or pressure:).

A chemical property of metal is its reaction with water which results in CORROSION.

PROPERTIES OF NON-METALS Nonmetals are DULL.Sulfur Phosphorus

Non-metals are NOT DUCTILE OR MALLEABLE. CANNOT BE MADE INTO WIRES. CANNOT BE HAMMERED INTO SHAPE

Solid non-metals are BRITTLE and break easily.

Non-metals are POOR CONDUCTORS OF HEAT AND ELECTRICITY. X X

Many non-metals are GASES. ChlorineIodine

Properties of METALLOIDS Metalloids (metal-like) have properties of both metals and non-metals. They are solids that can be shiny or dull. They conduct heat and electricity better than non- metals but not as well as metals. They are ductile and malleable. Silicon