The periodic table
1 mark · EasyState the number of protons in a sodium atom.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
11
Also accept: 11 protons
Common mistakes: 12; 10; mass number
Show mark scheme and worked solution
Marking points
A1 · 1 mark · States that sodium has 11 protons.
Worked solution
The atomic number of sodium is 11, so it has 11 protons.