Chapter U1.14, Problem 12E

Interpretation Introduction

Interpretation:

The isotope from the given isotopes which can be found in nature must be identified by their names.

Concept introduction:

Naturally occurring isotopes are stable unlike manmadeisotopes. For example, Uranium. Isotopes having n/p ratio lesser than 1.54 are generally stable and can be found in nature.

Answer to Problem 12E

Arsenic ₃₃As⁷⁵ can be found in nature.

Explanation of Solution

Europium (₆₃Eu¹⁶²) has very high n/p ratio and so it is very unstable and can’t be found in nature.

Barium (₅₆Ba¹¹²) has very low n/p ratio and can’t be found in nature.

Radium (₈₈Ra²⁶⁰) has very high n/p ratio and can’t be found in nature.

Among all the given isotopes only Arsenic ₃₃As⁷⁵ can be found in nature.

Conclusion

Thus, arsenic ₃₃As⁷⁵ can be found in nature.