Iodine-131 is a beta emitter used as a tracer in radio immunoassays biological systems. It follows first order kinetics. The half-life if iodine-131 is 8.04 dates. If you start with 8.0 grams of iodine-131, how many grams would remain at 39 days?

0.2774 grams of iodine-131 would remain at 39 days.

Explanation:

Initial concentration of iodine-131 =

Final concentration of iodine-131 after time t = [A] = ?

Duration of time = t = 39 days

Half life of the iodine-131 =

Rate constant =

For the first order kinetics :

[A] = 0.2774 g

0.2774 grams of iodine-131 would remain at 39 days.

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.