Unit 2: Atomic Structure Review WS
Name:________________
From the Atomic Structure Qz1
An atomic is the smallest part of an element that keeps the properties of that element. However, as small as
atoms are they are made of different subatomic particles known as protons, neutrons and electrons.
1.Contrast. Describe how the charges of protons and electrons and neutrons are different.
________________________________________________________________________________________
2.Contrast. Describe how the location of protons and electrons are different in an atom.
________________________________________________________________________________________
The periodic table is the periodic table of elements. Each square on the chart features a different element.
3.Define. What is an element? _______________________________________________________________
4. Apply. Water can be pure, but it is not an element on the periodic table. Why isn’t it? Explain your answer.
________________________________________________________________________________________
_______________________________________________________________________________________
5. Compare. How are the elements on the periodic table alike?
What do the atoms of different elements have in common? Pick two random elements + compare atoms.
________________________________________________________________________________________
________________________________________________________________________________________
6. Contrast? How are the elements on the periodic table different?
What is different about the atoms of different elements? Pick two random elements + contrast the atoms.
________________________________________________________________________________________
________________________________________________________________________________________
Each element has a square on the periodic table, and each square has two numbers.
Use the atomic mass and the atomic number to answer each question below
7.Which element has an atom with 11 protons and 12 neutrons?
____________________________________
8-9.How did you know this was the name of the element. Describe the steps you used to find your answer.
_______________________________________________________________________________________
_______________________________________________________________________________________
Predict. What happens to a neutral atom if you remove a different subatomic particle from the atom?
Use your science vocabulary to explain if it will impact the atomic mass, the atomic number and/or the name of the element.
10. Remove a proton: _____________________________________________________________________
11.Remove an electron: ___________________________________________________________________
12.Remove a neutron:_____________________________________________________________________
From the Isotopes Quiz
14. Give an example of an isotope. __________________________
15. Explain. How did you know this atom was an isotope of this element? What made it an isotope?
_______________________________________________________________________________________
Isotopes occur naturally in nature in different amounts. This is called the percentage of abundance. The
percentage of abundance of the isotopes of an atom can be used to determine the atomic mass of an
element.
Use the formula provided to find the average atomic mass of the following elements.
(isotope mass x abundance %) + (isotope mass x abundance %) + (isotope mass x abundance %) = ________ amu
100
16-17.Calculate the average atomic mass of Boron’s isotopes. Show your work. No magic numbers!
Isotope
Boron 10
Boron 11
Percent Abundance
20%
80%
18. Is your answer correct? How can you double check your answer to see if your calculations are correct?
_______________________________________________________________________________________
19. One of the laws of physics is that same charges repel. In the nucleus of an atom, protons are very close to
other protons. If that is the case, why do the protons stay inside the nucleus of an atom and not leave?
_______________________________________________________________________________________
_______________________________________________________________________________________
The difference between stable and unstable isotopes is the difference in their proton to neutron ratio.
20. _____ For an element to be considered stable, the neutron to proton ratio needs to be between what?
a. between 1.5 to 1 and 1 to 1
c. between 2 to1 and 1 to 2
b. between 1.9 to 1 and 1 to 1
d. none of the above
Answer the following questions using the Band of Stability Graph.
21. Element B is known to be highly radioactive. Describe a subatomic change that makes it more stable.
_______________________________________________________________________________________
22. If an element has 80 neutrons and 60 protons will it be radioactive? Why? Answer should discuss protons and
neutrons!
_______________________________________________________________________________________
23-24. Uranium 234 is used to make dental crowns appear brighter. The alpha decay of uranium 234 produces
what isotope? Set up the equation to solve for the new isotope.
_______________________________________________________________________________________
25-26. Flaws is welded metal parts of airplanes can be identified by placing the isotope Iridium 192 on one side
of the weld and photographic film on the other side to detect gamma rays that pass through. How does gamma
ray emission affect the atomic number and mass number of the Iridium? Why? Set up the equation to solve.
_______________________________________________________________________________________
27-28. Thorium 230 can be used to provide coloring in glass objects. One method of producing Thorium 230 is
through the radioactive decay of actinium 230. Is this alpha decay or beta decay? Show the equation.
_______________________________________________________________________________________
29-30. Compare and contrast nuclear fission and nuclear fusion.
Alike:
___________________________________________________________________________________
Different: ________________________________________________________________________________
-1 = A
-2 = A
-3 = A-
-4 = B+
-5 = B
-6 = B-
- 7 = C+
-8 = C
-9 = C