Question

Radium-226. a radium isotope, has a half-life (the time it takes half of the isotope to decay) of about 1620 years. A sample of radium-226 has a mass of 30 grams. Which of the following equations expresses the number of grams, g, of this sample that will be left after tyears? OA 1620 9= 30 -15.00 OB oc 9 = 30 - 157620 OD 9=301620

Answer 1

Quesa Solutions we know that - Amount Remaining – initial Amount - where nat - t = time elapsed - Ta Length of half life > n = no. of half lives - According to Question we have to find expression for Amount Remaining 9 Amount Remaining = g. » T = 1620 - Initial Amount = 30 s nat 1620 - put values in D we get = g = 30 (+11530

JO - option as is correct Answer