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Section 3: Periodic Trends

Periodic Trends

1.

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Atoms with large ionization energy values are __________.
A)more likely to form positive ions
B)less likely to form positive ions
C)most likely to lose their outer electrons
D)lacking valence electrons
2.
The atomic radius generally _______________ on the periodic table.
A)increases from top to bottom and from right to left
B)increases from top to bottom and from left to right
C)increases bottom to top and from right to left
D)increases from bottom to top and from left to right
3.
Atoms that lose electrons to form positive ions are __________.
A)nonmetals
B)metalloids
C)metals
D)noble gases
4.
What is the name for the amount of energy required to remove an electron from an atom?
A)ionization energy
B)electron affinity
C)ground state energy
D)dissociation energy
5.
Which element has the lowest first ionization energy?
A)Li
B)Na
C)K
D)Cs
6.
Which of the following have the same number of electrons? Cl, O2–, F, Ca2+, Fe3+
A)Ca2+ and Fe3+
B)Ca2+ and Cl
C)F and Cl
D)O2– and F
7.
Which of the following elements is most likely to form a negatively-charged ion?
A)I
B)Br
C)Cl
D)F
8.
In general, when comparing ions to their atoms, what trend is observed?
A)Positive ions are smaller and negative ions are larger than their corresponding atoms.
B)Positive ions are smaller and negative ions are smaller than their corresponding atoms.
C)Positive ions are larger and negative ions are larger than their corresponding atoms.
D)Positive ions are larger and negative ions are smaller than their corresponding atoms.
9.
Which of the following is an ion?
A)O2-
B)C
C)HCl
D)lithium-3
10.
How many protons and electrons are present in Al3+?
A)13 protons, 13 electrons
B)13 protons, 10 electrons
C)10 protons, 13 electrons
D)10 protons, 10 electrons
11.
How many protons are present in Ba2+?
A)56
B)54
C)58
D)0
12.
The ionic compound, sodium chloride, is formed from atoms of the elements sodium and chlorine. What happens to the size of each atom when it forms an ion?
A)Sodium increases in size and chlorine increases in size.
B)Sodium increases in size and chlorine decreases in size.
C)Sodium decreases in size and chlorine decreases in size.
D)Sodium decreases in size and chlorine increases in size.
13.
Which atom or ion has 16 protons and 18 electrons?
A)S2-
B)Ne2+
C)F-
D)N+
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