Essential Chemistry for IGCSE - Atoms, Elements And Compounds (Section 1 - No. 43)
How many neutrons are in the isotope of Sodium with a mass number of 23?
11
12
23
34
Explanation
Sodium (Na) has an atomic number of 11 (protons). 23 (mass number) - 11 (protons) = 12 (neutrons).
Comments (0)
