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ACT - Atomic Structure - Post-test



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

 1. 

Which of the following elements have the lowest ionization energy? _____
a.
C
b.
Si
c.
B
d.
Al
 

 2. 

Which halogens are gases at STP?
a.
chlorine and fluorine
b.
iodine and bromine
c.
iodine and fluorine
d.
chlorine and bromine
 

 3. 

Electronegativity _____.
a.
increases from right to left and from top to bottom
b.
doesn't change in the Periodic Table
c.
increases from left to right and decreases from top to bottom
d.
increases from left to right and from top to bottom
 

 4. 

The ______ determines how many electrons are available for sharing.
a.
distance from carbon
b.
Periodic Table columns
c.
Periodic Table rows
d.
distance from carbon
 

 5. 

K is _____.
a.
an alkaline earth metal
b.
a transition metal
c.
an alkali metal
d.
None of the above
 

 6. 

Transcatinide elements are _____.
a.
readily available in nature
b.
identified in large quantities
c.
synthesized
d.
All of the above
 

 7. 

Atomic mass in the Periodic Table _______ in the groups from top to the bottom.
a.
are almost the same
b.
decreases
c.
are the same
d.
increases
 

 8. 

Which element's ionic radius is smaller than its atomic radius? _____
a.
sodium
b.
nitrogen
c.
neon
d.
sulfur
 

 9. 

Cr is _____.
a.
a transition metal
b.
an alkaline earth metal
c.
an alkali metal
d.
None of the above
 

 10. 

The total mass of the atom includes _____.
a.
the mass of the protons
b.
the mass of the electrons
c.
the mass of the neutrons
d.
All of the above
 

 11. 

On the first principle energy level the maximum number of electrons is _____.
a.
2
b.
4
c.
1
d.
3
 

 12. 

Can He share electrons?
a.
no
b.
yes
 

 13. 

Which group is called transition metals?
a.
II A
b.
VIII A
c.
I A
d.
Right of group II A left of III A.
 

 14. 

The ionization energy _____.
a.
increases from left to right and decreases from top to bottom in the Periodic Table
b.
a, b, and c are correct
c.
measures how strongly an atom holds its electrons
d.
is the minimum energy required to remove an electron from the isolated, gaseous atom
e.
a and c are correct
 

 15. 

The electron's mass is _____.
a.
more than the proton's mass
b.
equal to the neutron's mass
c.
less than the proton's mass
d.
more than the neutron's mass
 

 16. 

The f sublevel has ____ orbitals.
a.
7
b.
2
c.
8
d.
1
 

 17. 

Rare earth metals are found in _____.
a.
the third group and the 6th and 7th periods in the Periodic Table
b.
the third group and 4th and 5th periods in the Periodic Table
c.
the first group in the Periodic Table
d.
None of the above
 

 18. 

Atomic mass in the Periodic Table _______ in the periods from right to left.
a.
decreases
b.
increases
c.
are almost the same
d.
are the same
 

 19. 

Using the Periodic Table, classify Br.
a.
Metal
b.
Semi-Metal
c.
Non-Metal
d.
None of the above
 



 
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