There are only two groups of s-block elements because an s-subshell has only one s-orbital which can accommodate only two electrons with opposite spins according to Pauli’s principle. They are group I ( or IA) and group 2 (or IIA).
Where are the s-block elements?
The s-block is on the left side of the conventional periodic table and is composed of elements from the first two columns plus one element in the rightmost column, the nonmetals hydrogen and helium and the alkali metals (in group 1) and alkaline earth metals (group 2).
What are s-block elements and its properties?
Properties of s-Block Elements
They have low ionization enthalpies. They lose the outermost electron(s) to form cation. Group 1 elements lose 1 electron while the group 2 elements loses 2 electrons. Metallic character increases down the group.
Why are groups 1 and 2 called s-block elements?
Answer: The first two vertical columns of the Periodic Table, i.e. Groups 1 and 2, are called the s–block metals, because they only have 1 or 2 electrons in their outer shell.
Why are s-block elements called representative elements?
– Both the s and p- block elements are collectively called as the representative elements. It is so because they are chemically very reactive metals and nonmetals and can easily attain the nearest noble gas configuration by losing or gaining the electrons from their valence shell.
Why are s-block elements metallic?
S block elements are light metals, have low melting and boiling points, have the highest atomic radii in their times of corresporidation, and are strong heat and electricity conductors. These have low ionisation energy levels and are thus strongly electropositive.
What are elements in the s and p-block called?
Hence s- and p-blocks elements are known as representative elements.
What is the general electronic configuration of s-block elements?
S block. The elements of Group 1 and Group 2 of the modern periodic table are called S block elements. The general outer electronic configuration of s block elements is ns(1-2).
Which block elements are called representative or main group elements?
The elements belonging to which group are called representative elements ? Group 1,2 and 13-18 are called normal element (or)main group element (or) represenntive elements.
