The atomic number of Phosphorus is 15 so that tells me there are 15 protons in the nucleus.
2. How many electrons are in Potassium?
Potassium's atomic number is 19 which is equal to the number of electrons.
3. How many neutrons are in an Argon atom?
Argon's mass is 40 (39.95) and it's atomic number is 18 so when I subtract, I get 22 neutrons.
4. What is the atomic mass of Aluminum?
According to the periodic table, the mass is 26.98.
5. What is the atomic number of Sodium?
According to the periodic table, the atomic number is 11.
6. What is the chemical symbol of Mercury?
Hg
7. What is the name for Xe?
Xenon
8. Which element has the greatest mass, Fluorine or Sulfur?
Fluorine's mass is 19 while Sulfur's is 32.07 so Sulfur has the greatest mass.
9. Which element has the most protons, Silicon or Beryllium?
Silicon's atomic number is 14 and Beryllium's is 4 so Silicon has the most protons.
10. Which element has the most neutrons, Helium or Carbon?
Using Mass-atomic number I found that Helium has 2 neutrons while Carbon has 6.
**Also make sure you study the location of the metalloids, metals, and nonmetals! **