Sodium Has an Atomic Number of 11 and an Atomic

Question

Sodium has an atomic number of 11 and an atomic mass of 23.Sodium has __________.
A) 12 neutrons and 11 protons
B) 12 protons and 11 neutrons
C) 12 electrons and 11 neutrons
D) 12 protons and 11 electrons
E) 12 electrons and 11 protons

Accepted Answer

The atomic number of sodium (11) indicates it has 11 protons. The atomic mass (23) minus the number of protons (11) gives the number of neutrons, which is 12.