Group 1 Metals

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Group 1 metals are very reactive. They have to be stored in oil to prevent them from reacting with or moisture in the air. There are elements in this group. Two elements are extremely reactive and these are and . Another element, , is radioactive and highly unstable.

All these elements react with water to form solutions. These metals are easily cut with a knife. They are normally very shiny , but they very quickly in air. Like other metals, they are good of electricity.

Alkali elements are unusual metals. They have a density compared with other metals, and they can float on water. They also have low points compared with other metals.

When lithium is dropped into water it fizzes and turns into lithium . (LiOH). The solution is . gas is also released during this reaction with water.

The reaction of sodium with water generates so much heat that it the sodium . It moves around on the surface of the water rapidly, and sparks are sometimes observed. This the hydrogen gas which is released during this reaction. The resulting compound is sodium (NaOH)

The reaction of potassium with water is violent. Extreme precautions are needed, since the molten metal is often ejected from the surface of the water into the . The hydrogen gas ignites almost immediately. The resulting compound is potassium (KOH)

Reaction of sodium with chlorine gas produces common salt (NaCL) . The reaction gives a bright flame. This compound is colourless, and easily in water.

Other salts are also produced in reactions with chlorine. Lithium (LiCl) and Potassium chloride (KCl) are other salts

The reactivity of group 1 metals from the top to the bottom of the group. There are simlar trends to be observed with melting points and density.

There are very few practical applications of group 1 metals. This is because they are so reactive. One application is the use of sodium vapour in lamps. Very small quantities of the chlorides of sodium and potassium are needed for human to be successful.

Alkali metals compounds are in water. Sodium compounds are used in products for the home such as in bleach, and in oven ,