Question

Валентность щелочноземельных и щелочных металлов равна ?

Answer 1

Щелочные металлы – элементы первой группы главной подгруппы (I), щелочноземельные элементы – элементы второй группы главной подгруппы (II)

Answer 2

Valency of Alkaline Earth and Alkali Metals

The valency of alkaline earth and alkali metals is +2.

This is because alkaline earth metals, which include elements like beryllium, magnesium, calcium, strontium, barium, and radium, have a valency of +2.

Similarly, alkali metals, such as lithium, sodium, potassium, rubidium, cesium, and francium, also have a valency of +1.

Therefore, the valency of alkaline earth and alkali metals is +2 and +1, respectively.