For 85
38 Sr, there are

Question

Quizplus · Accepted Answer

The atomic number of an element is equal to the number of protons in the nucleus. Since the element is 38 Sr, it has 38 protons. The mass number of an element is equal to the number of protons plus the number of neutrons in the nucleus. The mass number of 85 means that there are 85 total particles in the nucleus. Subtracting the number of protons (38) from the mass number (85) gives 47, which is the number of neutrons in the nucleus. Therefore, the best choice is C, which has 38 protons and 47 neutrons.

For 85 38 Sr, There Are