Question

in a group the reactivity of metals with oxygen increases give example​

Answer 1

Explanation:

The group 1 elements react with oxygen from the air to make metal oxides . ... The metal below the surface does not react. The alkali metals burn vigorously when heated and placed in a gas jar of oxygen. The oxide forms as white smoke.

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Answer 2

Answer:

In a group the reactivityof metals with oxygen increases.For intance, alkali meetals on expouser to air show an increase in affinity for oxygen as we move down the group.

Example for:

Lithium forms normal oxide.                                                                                

                                                 4Li(s)+O₂(g)⇒ 2Li₂O(s)

sodium forms per oxide.

                                                 2Na(s)+O₂(g)⇒Na₂O₂(s)

In period as we move from left to right, reactivity of metals with oxygen

decreases.