Question

explain the general characteristics of group 1and2element​

Answer 1

The alkali metals are a group (column) in the periodic table consisting of the chemical elements lithium (Li), sodium (Na), potassium (K),[note 1] rubidium (Rb), caesium (Cs),[note 2] and francium (Fr). This group lies in the s-block of the periodic table of elements as all alkali metals have their outermost electron in an s-orbital: this shared electron configuration results in their having very similar characteristic properties. Indeed, the alkali metals provide the best example of group trends in properties in the periodic table, with elements exhibiting well-characterised homologous behavior

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Answer 2

Group 1

Group 1 contains elements placed in a vertical column on the far left of the periodic table. The elements in group 1 are called the alkali metals.

The alkali metals share similar physical and chemical properties.

Physical properties

The alkali metals:

• are soft (they can be cut with a knife)
• have relatively low melting points
• The alkali metals also have low densities. They are low enough for the first three (lithium, sodium and potassium) to float on water.

Group 2

The elements have very similar properties: they are all shiny, silvery-white, somewhat reactive metals at standard temperature and pressure.

Structurally, they have in common an outer s- electron shell which is full; that is, this orbital contains its full complement of two electrons, which these elements readily lose to form cations with charge +2, and an oxidation state of +2.

i m sorry but the 2nd part has been pasted as i hv very few knowledge abt grp 2 elements ..

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