Alkaline Earth Metals And Water

The alkali metals - Group one

The grouping ane elements are all soft, reactive metals with low melting points. They react with water to produce an alkaline metallic hydroxide solution and hydrogen. Reactivity increases down the group.

Physical properties of the alkali metals

Grouping 1 contains elements placed in a vertical column on the far left of the periodic table . The elements in grouping 1 are chosen the alkali metals .

Periodic table with Group 1 metals coloured in red.

The brine metals share like physical and chemical backdrop .

Physical properties

The brine metals:

are soft (they can be cut with a knife)
have relatively low melting points

The brine metals also have depression densities . They are low enough for the first iii (lithium, sodium and potassium) to float on water.

Question: The bar chart shows the melting points of v alkali metals. Utilise this information to draw how melting bespeak changes in group i.
: Going down grouping ane, the melting indicate decreases.

Question: Francium is below caesium in the periodic tabular array. Use the information in the chart to predict the melting signal of francium. Explain your respond.
: The melting point of francium will be effectually 23 to 27°C. This is because francium is below caesium in the periodic table, so it should have a lower melting point, and the deviation in melting point decreases going from one chemical element to the side by side.