Atomic number is how many protons
- Carbon's atomic number is 6 how many protons does it have
- Atomic number of calcium is 20 how many protons does it have
- Iron is atomic number 26 how many protons does it have
- Atomic number indicates how many protons
- Atomic number 6 how many protons
- Oxygen's atomic number is 8 how many protons does it have
- Lithium's atomic number is 3 how many protons does it have
- Atomic number tells you how many protons and electrons
- Atomic number of 12 how many protons
- Atomic number of 19 how many protons
- Atomic number of 8 how many protons
- Is the atomic number how many protons there are