The ATOM AND THE PERIODIC TABLE

Alkali Metals Valence electrons

1

Alkali metals charge

+1

Alkaline Earth Metals valence electrons

2

Alkaline Earth Metals

+2

Transition metals valence electrons

varies

Transition metals charge

Varies, they can form more than one positive charge

Halogens valence electrons

7

Halogens charge

-1

Noble gases valence electrons

8 (helium has 2)

Noble gases charge

0

Most reactive in water

Alkali metals

Most reactive nonmetals

Halogens

Stable and unreactive

Noble gases

Physical change

Same chemical identity

Chemical change

New substance is formed

Physical properties

Can be tested without changing the identity of the substance

Chemical properties

Changed the identity of the substance

Common signs of a chemical change

Gas production, temperature change, and color change

Common signs of a physical change

Change in shape, or phase

What side of the periodic table are metals on

Left

What side of the periodic table are metaloides on

Middle

What side are nonmetals on

Right

Examples of physical properties being tested

Color,density,melting point, boiling point, Oder

Example of chemical properties being tested

Flammability, reactivity with acid

6 properties of metals

Shiny, malleable, conductivity on, high melting point, high density, reactive with acids

6 properties of nonmetals

Dull, brittle, conductivity off, low melting point, low density, not reactive with acid

Burning, Digesting, Rusting

Chemical changes

Melting, evaporating, freezing

Physical changes