Question

1. Give an example of an element that has isotopes and list its natural isotopes (excluding chlorine, hydrogen and carbon)​

Answer 1

One example of an element with isotopes is strontium, which has seven natural isotopes: 88Sr, 86Sr, 87Sr, 84Sr, 82Sr, 83Sr, and 81Sr. All of these isotopes are stable, except for 81Sr, which is a radioactive isotope with a half-life of 9.2 minutes.

Answer 2

One example of an element with isotopes is sulfur. Its natural isotopes include sulfur-32 (0.94%), sulfur-33 (0.02%), sulfur-34 (4.21%), sulfur-35 (0.75%), and sulfur-36 (0.18%).