Journal Entry #3
Subatomic Particles
Practice Problems
Refer to your blue handout entitled “Subatomic Particles”
Do the following problems in your journal.
1. Provide the location, charge and mass of the following subatomic particles:
a. Proton
b. Neutron
c. Electron
2. Write the correct number of protons, neutrons and electrons for Boron (look this up in the Periodic Table).
3. Sketch a Boron atom showing the correct locations of the subatomic particles (label these particles).
4. On the periodic table…
a. What does the atomic number stand for?
b. What must be true for element symbols that have 2 letters in them?
c. What is the other number listed about an element on the periodic table? Explain.
5. Write out the element names which match the following symbols:
H
He
Li
Be
B
Ne
Na
Mg
Al
Si
K
Ca
Ti
Cr
Mn
Zn
Br
Kr
Rb
Sr
Pt
Au
Hg
Pb
U
C
P
Fe
Ag
Pu
N
S
Co
Sn
O
Cl
Ni
I
6. Complete the following table regarding the number of subatomic particles in NEUTRAL atoms:
Element
Protons
Average Mass
Neutrons
Exact Mass
Electrons
Lead
50
30
56
79
47.867
F
Ar
Cu
Xe