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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.

Q. The hcp and ccp structure for a given element would be expected to have_______.

Q. The HCP and CCP structure for a given element would be expected to have:

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