1.01 – Atomic Structure 1 (Class)
1. Name the three particles in an atom and state the charge of each particle.
2. Identify the location of the three subatomic particles in an atom.
3. Explain the balance of forces that exists in a nucleus that makes it stable.
4. Construct a table which represents elements 1-10 which includes the Name, Symbol, Atomic Number,
Atomic Mass, No Protons, No Neutrons, No Electrons, and Electron Configuration.
5. A sodium atom has 23 nucleons and an atomic number of 11. State how many neutrons this sodium atom
will have.
6. State the number of electrons in each shell for the following atoms:
a. 5 electrons
b. 12 electrons
c. 20 electrons
d. 35 electrons
7. Write the name and symbol of the element with this electron configuration:
a. 2
b. 2,7
c. 2,8,3
d. 2,5
e. 2,8,7
8. Determine the electron configuration of the following elements:
a. Be
b. S
c. Ar
d. Mg
e. Ga
9. Identify two elements that have two electrons in their valence shell. Using the periodic table, describe
another similarity between these elements.
10. Calculate the amount of maximum electrons able to be held within the fifth and sixth energy level.
a. 5th
b. 6th
11. Complete the following table.
Element
Symbol
Atomic
Number
Relative
Atomic Mass
No Protons
No Neutrons
No Electrons
Atomic
Notation
Osmium
Ba
26
97
Protactinium
140
3
46
22𝑇𝑖
Zn
20.18
Bismuth
10
209.0
44
58
36
U
143
69
14
14
200.6
60
28𝑁𝑖
47
79
118
156
65𝑇𝑏