The concentration of rn−222 in the basement of a house is 1.45 × 10−6 mol/l. assume the air remains static and calculate the concentration of the radon after 3.00 days. the half-life of rn−222 is 3.82 days.

The concentration of radon after the given time is

Explanation:

All the radioactive reactions follows first order kinetics.

The equation used to calculate half life for first order kinetics:

We are given:

Putting values in above equation, we get:

Rate law expression for first order kinetics is given by the equation:

where,  

k = rate constant =

t = time taken for decay process = 3.00 days

= initial amount of the reactant =

[A] = amount left after decay process =  ?

Putting values in above equation, we get:

Hence, the concentration of radon after the given time is

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.