ns1 or ns2
Group 1 and group 2 elements are called s-block elements
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The densities of s-block elements vary depending on the specific element. Generally, s-block elements like lithium, sodium, and potassium have low densities compared to d-block and f-block elements. As you move down the s-block of the periodic table, the densities of the elements tend to increase due to the increase in atomic size and mass.
4: the s-block, the p-block, the d-block, and the f-block. there is an theoratical g-block but its not counted because its theoratical lol.
The s block and p block elements are located in the main group elements of the periodic table. The s block elements are in groups 1 and 2, while the p block elements are in groups 13 to 18. These elements are located on the left and right sides of the periodic table, respectively.
Main group elements include elements (except hydrogen) in groups 1 and 2 (s-block), and groups 13 to 18 (p-block).
s-block elements: groups 1 and 2 p-block elements: groups 13 to 18
s block elements are colorless because they do not have any unpaired electrons in their atomic orbitals to exhibit color. The absence of unpaired electrons means that these elements do not absorb visible light in the wavelength range that corresponds to color perception. As a result, s block elements appear colorless to the human eye.
The s, p, d, f block realte to the filling of the outer shell orbitals. Group 1 and 2 are the s block. Groups 13-18 the p block, the transition metals the d block and the lanthanides and actinides the f block.
The f-block of the periodic table contains the most elements, as it includes the lanthanides (15 elements) and actinides (15 elements), totaling 30 elements. In contrast, the s-block has 2 elements, the p-block has 18 elements, and the d-block has 10 elements. Thus, the f-block is the largest in terms of the number of elements it encompasses.
S block elements are named so bcozIn this elements last electron enters the outermost s orbital(i.e. ns1 or ns2).
s-block elements: groups 1 and 2 p-block elements: groups 13 to 18