Question

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Answer 1

Answer:

a)Lithium, Sodium, and Potassium have a similarity in them that is they all have one electron in their outermost orbit.

b)Beryllium, Magnesium, Calcium, Strontium, Barium, Radium

Because the outer electron structure in all of these elements is similar, they all have somewhat similar chemical and physical properties. ... Strontium, barium, and calcium react readily with oxygen in the air to form their oxides.

Answer 2

Answer:

they all are of same group I.e., lithium ,sodium and potassium are of same group and possess same properties as them

and beryllium, magnesium and calcium have same properties like them and also they are the same group... they have same valency and valence electrons

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