Review sheet for Periodic Table Test
1. Study your Periodic Table tips (attached). Know the properties of Alkali Metals (G1),
Alkaline Earth Metals (G2), Halogens (G17) and Noble Gasses (G18). Know how to find the #
of protons and electrons and how to use the rounded atomic mass to find the # of neutrons
in an atom of ANY element.
2. Fill in the table below:
Atomic #
Atomic
Mass
1
1
# of
Protons
# of
Neutrons
65
# of
Electrons
36
20
45
3. Fill in the table below:
Subatomic
Particle
Symbol
Charge
Location
Mass
P
N
E
4. What is the overall charge of the Nucleus? Explain.
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5. What is the charge of the Electron Cloud? Explain.
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6. Explain what makes an atom neutral?
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7. Where is most of the mass of the atom located? Explain.
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8. What are the orbitals or “energy levels” of an atom? How do we find them on the Periodic
Table?
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9. What are groups/families? How do we find them on the Periodic Table?
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10. What two things does the group number tell you about the elements in that group?
1. ______________________________________________________________________________________________
2. ______________________________________________________________________________________________
11. Identify the missing information for the following elements:
Element
Name
and Symbol
Group #
# of Valence
Electrons
Period #
# of orbitals/
energy levels
Cesium (Cs)
Xenon (Xe)
Oxygen (O)
Magnesium
(Mg)
Chlorine (Cl)
12. Name an element that is found in group 7, period 3. ________________________________
13. Name an element that is found in group 14, period 4 ________________________________
14. What are valence electrons? What do they tell as about an atom?
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15. What makes an atom stable/unreactive?
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16. What are the elements in group 18 called? Why are the elements in group 18
stable/unreactive.
Group Name (18) ______________________________________
Unreactive because __________________________________________________________________________________
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17. What are the elements in Group 1 and Group 17 called? Why are they the most reactive
groups?
Group Name (1) _______________________________________
Most reactive Metals because ______________________________________________________________________
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Group Name (17) _____________________________________
Most reactive Nonmetals because _________________________________________________________________
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18. How does the reactivity change as you go from Group 1 – Group 12? ______________________
19. How does the reactivity change as you go from group 13 – Group 17? ____________________
20 How does reactivity change from the top of a group to the bottom? ________________________
Why? __________________________________________________________________________________________________
21. What are the rules for the number of electrons in each of the first 3 energy levels?
1st Orbital can hold __________
2nd Orbital can hold __________
3rd Orbital can hold __________ but is happy with _________
22. What element is indicated by the following Bohr Model?
Element ___________________________________
How many valence electrons does it have? _______
What group does it belong to? ______________ Period ? _______________
Name two elements with a similar reactivity __________________________ & ________________________
23. Draw a Bohr Model of an element in group 17, period 3. Answer the following questions.
# of protons _____
# of electrons _____
# of neutrons _____
# of orbitals _____
# of valence electrons _____
Reactivity ______________________________________________________________________