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Unit 3 On Level Test

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

The energy required to remove an electron from an element is called the
a.
electronegativity
c.
atomic radius
b.
electron affinity
d.
ionization energy
 

 2. 

How many neutrons would mc002-1.jpg have?
a.
32
c.
20
b.
16
d.
18
 

 3. 

What is the mass number of a carbon isotope that has 6 protons, 6 electrons, and 8 neutrons?
a.
14
c.
12
b.
20
d.
2
 

 4. 

Name the only element that is consider a metalloid
a.
Silicon
c.
Sulfur
b.
Hydrogen
d.
Nitrogen
 

 5. 

The energy that is pulling on an electron in order to share that electron with aothern element is called the
a.
electron affinity
c.
atomic radius
b.
electronegativity
d.
ionization energy
 

 6. 

As the atomic number increases within a group of elements, the atomic radius usually--
a.
increases
c.
decreases, then increases
b.
decreases
d.
remains the same
 

 7. 

Which of the following factors contributes to the increase in ionization energy from left to right across a period?
a.
fewer electrons in the highest occupied energy level
b.
an increase in the volume of the atom
c.
an increase in the shielding effect
d.
an increase in the number of protons
 

 8. 

Which family correctly represents the elements in Group 1 on the periodic table?
a.
Transition metals
c.
Alkali metals
b.
Lanthanide metals
d.
Actinide series
 

 9. 

Which of the following would have the greatest electronegativity?
a.
Fluorine
c.
Sulfur
b.
Beryllium
d.
Potassium
 

 10. 

How many electrons are in a Cd3+ ion?
a.
48
c.
51
b.
45
d.
112
 

 11. 

Helium and Hydrogen in their gas states are less dense than air. Why is helium used to inflate balloons rather than hydrogen?
a.
Hydrogen is not a gas
c.
Hydrogen is too light and will leak out of the balloon
b.
Hydrogen has a higher atomic number than Helium
d.
Like the others in its group, helium is an unreactive gas
 

 12. 

Sodium, mercury, argon, and neon are used in the production of lamps. There are fewer safety guidelines regarding the handling of neon and argon than for mercury and sodium. Which of the following best describes the elements within the group of the periodic table that contains neon and argon gas?
a.
Gaseous at room temperature and  unreactive
c.
Solid at room temperature and mildly reactive with strong acids
b.
Gaseous at room temperature and highly reactive with metals
d.
Solid at room temperature and mostly unreactive with strong acids
 

 13. 

What is the element with the lowest electronegativity value?
a.
calcium
c.
cesium
b.
fluorine
d.
Hydrogen
 

 14. 

The sample below contains the mass for the stable isotopes of an element. Calculate the average atomic mass


IsotopeMassPercent Abundance
Isotop 184.92 amu72.15%
Isotope 286.91 amu27.85%
a.
85.47 amu
c.
86.21 amu
b.
85.13 amu
d.
86.49 amu
 

 15. 

Which of the following is true about subatomic particles?
a.
The mass of a neutron  equals the mass of a proton.
b.
Protons are positively charged and the lightest subatomic particle.
c.
Electrons are negatively charged and are the heaviest subatomic particle.
d.
Neutrons have no charge and are the lightest subatomic particle.
 

 16. 

The average atomic mass of an element depends upon the ____.
a.
relative abundance of protons in that element
b.
mass of each isotope of that element
c.
mass of each electron in that element
d.
mass and relative abundance of each isotope of that element
 

 17. 

Which of the following would have the greatest ionization energy?
a.
Helium
c.
Chlorine
b.
Calcium
d.
Francium
 

 18. 

Which of the following factors contributes to the increase in atomic size within a group on the periodic table?
a.
an increase in number of protons
b.
fewer electrons in the highest occupied energy level
c.
an increase in size of the nucleus
d.
more energy levels as you go down a group
 

 19. 

How many protons does an atom of Potassium (K) have?
a.
19
c.
15
b.
39
d.
31
 

 20. 

An isotope of mercury has 80 protons and 120 neutrons. What is the mass number of this isotope?
a.
80
c.
120
b.
200
d.
160
 

 21. 

A chemical change occurs when a piece of wood ____.
a.
decays
c.
is painted
b.
is split
d.
is cut
 

 22. 

Which of the following processes does NOT involve a change in chemical properties?
a.
boiling
c.
burning
b.
fermenting
d.
rusting
 

 23. 

Which family of elements has properties of both Metals and Non-metals?
a.
Lanthanide Series
c.
Alkaline Earth Metals
b.
Transition metals
d.
Metalloids
 



 
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