the modern periodic table. the horizontal rows of the periodic table are called periods
Post on 29-Dec-2015
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The vertical columns of the periodic table are called GROUPS, or FAMILIES.
The elements in any group of the periodic table have similar physical and chemical properties!
ALKALI METALS
●Li, Na, K, Rb, Cs●High chemical reactivity●Reacts vigorously with water● * Reactivity of Metal Increases as you
go down the periodic table● * Hardness of Metal Decreases as you
go down the periodic table● * Melting Point of Metal Decreases as
you go down the periodic table
Halogens
● F, Cl, Br, I
●* Reactivity of Non-metallic elements Decreases as you go down the periodic table.
●* Boiling Point and Melting Point Increase as you go down the periodic table.
NOBLE GAS FAMILY
● He, Ne, Ar, Kr, Xe, Rn○ inert, low reactivity○ do not form stable
compounds with other elements
○ electron arrangement is stable
Properties of Metals
•Shiny, lustre•Hard•Good conductors of heat/electricity•metals are malleable, ductile,
Zinc
Properties of Non-Metals
• Non-metals are poor conductors of heat and electricity.
• Non-metals are not ductile or malleable.
• Solid non-metals are brittle and break easily.
• They are dull.• Many non-metals are
gases.
Sulfur
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