Question

Which of the following isotopes contains the same number of protons as 23Na+? And why

23Na
22Na
24Mg
24Al-

Answer 1

23Na

Step-by-step explanation:

23Na+ has 11 protons since the atomic number of sodium (Na) is 11.

Therefore, the isotope that contains the same number of protons as 23Na+ is 23Na itself.

22Na has 10 protons, 24Mg has 12 protons, and 24Al- has 13 protons. Therefore, they dont contain the same number of protons as 23Na+.