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Alkali metals

Here we’ll study (A) Alkali metals, and (B) Alkaline Earth Metals

Alkali metals

On the far left of the periodic table

Never found freely in nature

malleable, ductile

great electrical conductor

Each member has 1 valence electron, ready to share when bonding with other atoms.

When placed in water, these metals break water molecules apart and release hydrogen gas. This reaction produces heat, ignites the hydrogen, causeing an explosion.

http://www.geek.com/science/10-super-cool-chemistry-gifs-1578608/

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Alkaline Earth Metals

The 2nd column

Never found freely in nature

malleable, ductile

great electrical conductor

the 2nd most reactive family of elements in the periodic table.

When mixed in solutions, they often form solutions with a pH greater than 7.  These are defined as being alkaline (or “basic”) solutions. Alkaline the opposite of being acidic.)

Each member has 2 valence electrons, ready to share when bonding with other atoms.

While not as reactive as the alkali metals, this family knows how to make bonds very easily. Each of them has two electrons in their outer shell. They are ready to give up those two electrons in electrovalent/ionic bonds.

As you get to the bottom of the list, you will find the radioactive radium. While radium is not found around your house anymore, it used to be an ingredient in glow-in-the-dark paints. It was originally mixed with zinc sulfide (ZnS). The other elements are found in many items, including fireworks, batteries, flashbulbs, and special alloys. The lighter alkaline earth metals, such as magnesium and calcium, are very important in animal and plant physiology. You all know that calcium helps build your bones. Magnesium can be found in chlorophyll molecules.

http://www.chem4kids.com/files/elem_alkalineearth.html

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