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Alkaline Earth Metals And Water

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. Group 1 is on the left-paw side of the periodic table

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.

Bar chart of the melting points of Group 1 elements.

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.

Alkaline Earth Metals And Water,

Source: https://www.bbc.co.uk/bitesize/guides/zpvf4qt/revision/1

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