Name: ____________________________ Date:________________ Class Period: _______________
Valence Electrons: Notes & Practice
Electron
Shell/Energy
Level
1
Max Number of
Electrons
2
3
1. Put the parking lot rule in your own words: _____________________________________________________________________
__________________________________________________________________________________________________________
2. What charge does a proton have? _______ What charge does a neutron have? ______ What charge does an electron have? _________
3. If an atom has the same number of protons, neutrons, and electrons, what is the atom’s charge? ___________
4. If an atom has more protons than electrons, what is the atom’s charge? ______________
5. Below each atom, write down how many valence electrons it has in its outer shell.
6. Is argon’s outer shell full? ______________If no, how many more valence electrons does it need to have a full outer shell? ______
7. Is chlorine’s outer shell full? ______________ If no, how many more valence electrons does it need to have a full outer shell? ______
8. Is helium’s outer shell full? ______________ If no, how many more valence electrons does it need to have a full outer shell? ______
9. Is potassium’s outer shell full? ______________ If no, how many more valence electrons does it need to have a full outer shell? ______
CARBON
6 protons
6 neutrons
6 electrons
Draw a diagram of a nitrogen atom.
Draw a diagram of a hydrogen atom.
HYDROGEN
1 protons
0 neutrons
1 electrons
NITROGEN
7 protons
7 neutrons
7 electrons
Draw a diagram of a fluorine atom.
Draw a diagram of a neon atom.
NEON
10 protons
10 neutrons
10 electrons
FLUORINE
9 protons
10 neutrons
9 electrons