![]() When s-block elements are exposed to the flame, they impart characteristic colors. This is due to the presence of the loosely held valence electron which can easily be removed. The s-block elements are good conductors of heat and electricity. This is because of the increase in atomic size and increasing ease with which an electron can be removed from the outermost shell. The reactivity of s-block elements increases down the group. Therefore, they can form mono-positive and dipositive cations. These electrons can be easily removed due to the low value of ionization potential. The s-block elements contain one or two electrons in their outermost shell. The melting and boiling points of alkaline earth metal are shown below: The melting and boiling points of alkali metals are shown below: Similarly, their melting and boiling points decrease down the group due to an increase in size. The s-block elements have low melting and boiling points due to their large sizes. Carnallite – KCl.MgCl 2.6H 2O Melting and boiling points.Some most important minerals of s-block elements are: The electronic configuration of alkaline earth metals is shown below:Īlmost all the s-block elements are present in combined states. ![]() The electronic configuration of alkali metals is shown below: The s-block elements lose their electrons to form mono-positive and di-positive ions. While the alkaline earth metals contain two electrons. The alkali metals in the s-block contain one electron in their valence shell. Properties of s-block elements Electronic configurationĮach s-block element has valence electrons in the s-orbital. Each row of the periodic table contains two s-block elements. The s-block elements are on the left side of the periodic table except for helium. The elements of group IIA are called alkaline earth metals.The elements of group IA except hydrogen are called alkali metals.The s-block of the periodic table comprises the IA and IIA group metals along with hydrogen (H) and helium (He). Concepts Berg s-Block of Periodic table.
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