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Worksheets8th Grade: Chemistry Quiz #3 Review
Total questions: 11
Worksheet time: 6mins
Name
Class
Date
1.
How many nitrogen atoms are in the chemical formula below?
5C8H10N4O2
5C8H10N4O2
a)
4
b)
None
c)
20
d)
5
2.
Which description correctly identifies the substance below?
2Ca(OH)2
2Ca(OH)2
a)
2 atoms of Calcium, 4 atoms of Oxygen, 4 atoms of Hydrogen
b)
2 atoms of Calcium, 2 atoms of Oxygen, 2 atoms of Hydrogen
c)
2 atoms of Calcium, 1 atom of Oxygen, 2 atoms of Hydrogen
d)
2 atoms of Calcium, 2 atoms of Oxygenhydrogen
3.
How many molecules are in the following formula?
6C2H10O3
6C2H10O3
a)
90
b)
6
c)
3
d)
0-this is not a molecule, this is a compound
4.
What formula would you use if you were asked to find the MASS of a piece of copper?
a)
M= Density/Volume
b)
M= DV
5.
What formula would you use if you were asked to find the VOLUME of a piece of copper?
a)
V=M/D
b)
V=MD
6.
What formula would you use if you were asked to find the DENSITY of a piece of copper?
a)
D=M/V
b)
D=MV
7.
True or False: All of the following examples of an element.
Cr, O2, He, HCl
Cr, O2, He, HCl
a)
True
b)
False- O2 is not an element
c)
False- HCl is not an element
d)
False- none of them are elements
8.
If the outside shell of an element is not full, the element is considered reactive, which means it is more likely to do what?
a)
bond with another element to get rid of electrons to EMPTY OUT its outside shell
b)
bond with another element to gain electrons to COMPLETE its outside shell
9.
True or False: If elements are in the same Group on the Periodic Table, they do NOT have similar characteristics.
a)
True
b)
False
10.
Brittle, poor conductors of electricity, and very reactive, are all characteristics of what type of element group on the Periodic Table?
a)
Metals
b)
Halogens
c)
Non-metals
d)
Metaloids
11.
Which information provided by the Periodic Table can help identify an element's reactivity?
a)
Period number
b)
Group number
c)
Mass number
d)
Atomic number
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