Q: In a solid AB having NaCl structure. A atoms occupy the corners of cubic unit cell if all the face centered atoms along one of the axes are removed then the resultant stoichiometry of the solid is?

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tetrahedron

effective no. of A atoms = (8*1/8)+(4*1/2)=3 effective no. of B atoms = (12*1/4)+1=4 therefore formula of the solid = A3B4

Thr polyatomic anion sulfate has a central S atom surrounded by O atoms at the corners of a terrahedron. The bond lengths are all the same, the bond angles are 109.5 o

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A FCC or Face Centered cubic unit cell has 4 atoms. It is calculated like this. There are 8 corners of the unit cell and each corner has one atom.But each atom is shared by 8 unit cells. So. total no. of atoms at corners= 1/8 *8=1 atom . Also, there are 6 faces which have one electron in the centre of it. Each such electron is shared between 2 unit cells. This gives the total no. of atoms at the centre of faces of unit cell=1/2 * 6 = 3 atoms. Adding the two, we get four atoms in an unit cell 1+3=4 atoms.

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face centre cubic crystal has eight atoms in each corner and one atom in the centre of cubic unit cell.while hexagonal close packed structuree has only six atoms in corners but no in the centre of cubic cell

Body centered is another cubic unit cell.This unit cell has atoms at the eight corners of a cube and one atom in the center. Once again, the corner atoms are bisected by three orthogonal the planes leaving one-eighth of each atom inside. The central atom is also inside, so this unit cell contains two atoms. Nickel is an example of a substance that has a body centered cubic crystal structure.

a solid with flat sides meet at sharp edges and corners is called crystal structure

XY3

tetrahedron

They didn't have any corners so an attacking army couldn't collapse the corners. The arch is a very strong structure, so it was harder to destroy with siege machines.

The Anasazi Indians live on the Four Corners which is Colorado, New Mexico, Arizona, and Utah.

20 sided ( or facets) vertex (12 evenly spaced corners)

A face-centered cubic unit cell is a cube. All sides are the same length and all face perpendicular to each other, with an atom at each corner and an atom in the middle of each face of the cell.

A cube has 6 faces. It also has 12 edges and 8 corners. Cubes are a three dimensional structure.

effective no. of A atoms = (8*1/8)+(4*1/2)=3 effective no. of B atoms = (12*1/4)+1=4 therefore formula of the solid = A3B4

No. A circle has no corners and a square has four corners. There is no object that has no corners and four corners.