GCSE P4

GCSE P4

1. What is the typical radius of an atom?

   • 1 times 10 the power of 10 meters

2. How much times smaller is the radius of the nucleus?

   • 10,000

3. What is the charge of a Proton, Neutron and Electron?

   • P=1+ N=0 E=1-

4. What is the relative mass of all three?

   • P=1 N=1 E=1/1836

5. Where are they all located?

   • P=Nucleus N=Nucleus E=Outter shell

6. The atomic number tells us how many protons and electrons an element

   • The atomic mass tells us the total number of protons and neutrons an element has
     • The number of protons and the number of electrons are always equal
       • If an atom losses or gains an electron it becomes an ion
   • Two atoms of the same element with the same number of protons but a different number of neutrons are called isotopes