9. Ra decays by the emission of B particles. The half-life for the decay is 6.67 years.a. Write the nuclear equation to representthe decay ofb. A sample containing 0.50 g of Ra is kept in a closed container. Calculate themass of Ra remaining after 5 years.228(The decay of a radioisotope can be described by the equation, N, - No e whereNo and N, respectively represent the initial number and number at time t of theradioisotope, and k is the decay constant.)

Given : 22888Ra undergoes beta particles emission decay. And half life for decay = 6.67 years.

Ra decays by the emission of B partides. The half-ife for the decay is 6.67 years. a. Write the nudear equation to represent the decay of 2Ra. b. Asample containing 0.50 g of ³#Ra is kept in a dosed container. Cakulate the mass of Ra remaining after 5 years. (The decay of a radioisot ope can be described by the equation, N,- No e where No and N, respectively represent the initial number and number at time t of the radioisotope, and kis the decay constant.)