All group 1 metals are reactive metals and have a low melting point.

The elements in group 1 are

Lithium, sodium, potassium, rubidium, caesium and francium

The metals are soft and can be cut.

The melting point decreases

Density increases

Reactivity increases

As you go down the group.

These metals are Lithium, Sodium, Potassium, Rubidium, Cassium and Firancium.

The boiling and melting point of the metals decrease down the group. For example, Lithium has the highest boiling point of 1342 degrees celcius, and Caesium has the lowest boiling point of 671 degrees celcius.

On the other hand, the chemical reactivity and also density increases down the group.

-all have one electron in their outer shell

- being very reactive, and having low densities and softness

-the rise in atomic mass balances for the larger atomic size

-low density.

- low melting and boiling point.

- all alkali metals

- form positive ions to a charge of +1 (lose one electron to

form SNGC)

- all have the same number of electrons in their valance shell (1 electron)

- low melting point (decreases as you go down the group) & low density (increases as you go down the group)

eg. lithium,sodium,potassium and rubidium

- soft and can be cut easily

- They are very reactive, they are stored in oil to prevent them from reacting with air and water

- react with water to form soluble bases (alkalis)

List of the elements: lithium,sodium,potassium,rubidium,Caesium and francium

• has 1 valence electron in the outermost shell

• they react with water to form alkali

• low melting points

• stored in mineral oil solution as they are very reactive

• alkalis metals are soft due to the presence of single electron in their valence shell

• boiling point: between 98 and 99 degrees Celsius.

  
  

  Trends:

  chemicals reactivity increases down the group

• density (in general) increase down the group

• decrease in melting and boiling point