Or a metal that has the body-centered cubic crystal structure, calculate the atomic radius if the metal has a density of 7.25 g/cm3 and an atomic weight of 50.99 g/mol.

The density of a unit cell lattice is calculated using the following formula:

...... (1)

Here, is density, m is molar mass or atomic weight, n is number of atoms per unit cell, a is edge length and is Avogadro's number.

For a body centered cubic lattice, number of atoms per unit cell is 2 and relation between edge length a and radius of atom r is as follows:

...... (2)

Here, r is atomic radius and a is edge length.

Calculate edge length by rearranging equation (1) as follows:

Density of metal is and molar mass is 50.99 g/mol, putting the values,

Therefore, edge length is , putting the value in equation (2) to calculate atomic radius.

Therefore, atomic radius will be .

answer: option (b) is the correct answer.

explanation:

a covalent bond is formed by sharing of electrons. whereas polarity arises due to difference in electronegativity of two atoms.

therefore, more is the electronegativity of an atom which combines with the titanium, more readily it will induce a partial positive and negative charge.

thus, out of the given options fluorine is most electronegative and has an incomplete octet. therefore, it will readily combine with titanium to share the electrons and complete its octet.  

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.