Physical sci half ife of a radioisotope is 4 x 10" years. if these are 10 radioactive nuclei in a sar he number of such nuclei in the sample4 * 10 years ago wer

Physical Sci Half ife of a radioisotope is 4 x 10" years. If these are 10 radioactive nuclei in a sar he number of such nuclei in the sample4 * 10 years ago were. 128x 10 lei in a sam le today CEduncle.com (B) 256x 103 1024x 103 (A 512x 103 (D) (C (D) T= 4 x 10" years Sol Number of nuclei = 103 4x10 Number of half lifes = 4x10 8 = 10 N= N.e- 10 N,e 0.693x4x10 4x10 10= N.eero 210 10= N N, = 1024x 103