Question

In most stable elements, the number of protons and neutrons are_________.

• A. odd-odd
• B. even-even
• C. odd-even
• D. even-odd

Answer 1

The correct option is B even-even

In most stable elements, the number of protons and neutrons are even-even.
Thus, the elements with an even number of protons and neutrons are more abundant, more stable and richer in isotopes. Nuclides with an odd number of protons and neutrons are least abundant in nature. (only 5 are known).