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Photoelectric Effect

In s-block el...

Question

In s-block elements in one video it is shown that lithium has HCP structure and in another video it is shown that other elements except Lithium has HCP structure in s block group 1 elements.

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Solution

The body-centred cubic (bcc) structure is the most stable form for lithium metal at 298 K.

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Q. In byju app the video on s block elements, sir in the video on physical properties of 1 group element at 1:03 min sir said Li exist in HCP shape but at 3:45 min in same video he said it is the only one who does not exist in HCP structure!!!! Why????

Q. In a binary compound, atoms of element A form a hcp structure and those of element M occupy 2/3 of the tetrahedral voids of the hcp structure. The formula of the binary compound is:

Q. Modern periodic table is arranged in order of increasing atomic numbers and after filling of 7 elements in the second period after lithium the eighth element sodium has same property as that of the lithium and hence placed just below lithium.

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