Which of the following `"is"//"are"` incorrect?

Options

A. 1 curie `- 3.7 xx 10^(10)` dis
B. Actinium series starts withs `U^(238)`
C. Nuclear isomers contains the same number of protons and neutrons.
D. The decay constant is independent of the number of the substance taken.

Answer

C, D

Explanation

Nuclear isomers have same atomic number and atomic mass number. The decay constant depends upon initial amount of substance, `K = (2.303)/(t) "log" (a)/(a - x)`