Ahypothetical alloy has an atomic weight of 43.1 g/mol, a density of 6.40 g/cm3, and an atomic radius of 0.122 nm. determine whether its crystal structure is fcc, bcc, or simple cubic

Option 2: BCC

The expression for density of cell is as follows:

...... (1)

Here, n is number of atom per unit cell, A is atomic mass, is volume of crystal and is Avagadro's number.

Also, the expression for volume of crystal is as follows:

The atomic weight, density and Radius of atom is given 43.1 g/mol, and 0.122 nm respectively.

Converting radius into cm:

Thus,

Putting the value to calculate volume first:

Now, putting all the values in equation (1)

On rearranging,

The number of atom per unit cell is 2 for body centered cubic lattice thus, correct option is BCC.

bcde is the incorrect answer it is a

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.