Name: ____________________________________
Date: _______________
Circle your college:
Duke
7th Grade Science- Ms. Hart
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Cornell
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Northwestern
7.5 Periodic Table Scavenger Hunt
1. What does the atomic number represent?
2. What does the atomic mass represent?
3. Use your knowledge of atomic calculations to complete the chart.
Element Symbol
Atomic
Mass
Protons
Neutrons
Number
Number
Ni
28
31
K
39
W
19
74
Ne
Electrons
110
10
10
4. What is a group?
5. What is a period?
6. What are valence electrons?
7. Complete the following table.
Group
Common Name
Number of valence
electrons
1
2
17
18
8.
9.
10.
11.
12.
13.
________ Which element is a metal: Ba (56) or At (85)?
________ Which period is Ca (20) in?
________ What is the number of the group N (7) is in?
________ Which element is an alkali metal: Rb (37) or Al (13)?
________ Which element is a halogen: Na (11) or Cl (17)?
________ Which element is a noble gas: Ne (10) or Br (35) or O (8)?
14.
15.
16.
________ How many valence electrons does Na (11) have?
________ Which element has 5 valence electrons? B (5) or P (15)?
________ How many neutrons does calcium-20 have?
Use a periodic table to help you answer the following questions.
17. a. How many protons does an atom of bromine (Br) have?
b. In which period number is bromine found?
c. What is the common name of this group?
d. How many valence electrons does it have?
e. Is it a metal, a nonmetal, or a metalloid?
f. Is it a solid, liquid or gas?
18. a. How many protons does an atom of potassium (K) have?
b. In which period number is potassium found?
c. What is the common name of this group?
d. How many valence electrons does it have?
e. Is it a metal, a nonmetal, or a metalloid?
f. Is it a solid, liquid or gas?
a.
b.
c.
d.
e.
f.
a.
b.
c.
d.
e.
f.
19. Where are metalloids found on the periodic table?
20. List 7 symbols of metalloids found on the periodic table
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21. Which elements are classified as nonmetals? List their symbols.
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