Question 1
5 out of 5 points
Which of the following atoms, designated by their electron configurations, has the highest ionization energy?
Selected Answer: [Ne]3s2 3p3
Question 2
5 out of 5 points
The electron configuration of element X is 1s22s22p63s23p63d34s2. What is its period number
and group?
Selected Answer: Period 4, Group VB.
Question 3
0 out of 5 points
Consider a nitrogen atom in the ground state and choose the correct statement below.
A. Zeff for an electron in a 2s orbital is greater than that for the 1s orbital. F
B. The Zeff for the 2p and 2s orbitals is the same. F
C. More energy is required to remove and electron from a 2s orbital than from the 2p orbital.
T
D. The 2s electron is less shielded than the 2p electron. T
C AND D IS TRUE
Selected Answer: None is correct
Question 4
5 out of 5 points
-
The ion NO has __________ valence electrons.
Selected Answer: 12
Question 5
5 out of 5 points
+
How much energy, in joules, must be absorbed to convert to Na all the atoms present in 1.00
mg of gaseous Na? The first ionization energy of Na is 495.8 kJ/mol?
Selected Answer: 21.6 J
Question 6
5 out of 5 points
Which is the most metallic in the following atoms, Bi, S, Ba, As, Ca?
Selected Answer: B
a
Question 7
5 out of 5 points
Strontium is an element in Group 2 of the Periodic Table with atominc number 38. Which of
the following statements about strontium is NOT correct?
Selected Answer: Its atomic radius is smaller than that of magnesium
Question 8
5 out of 5 points
What is the maximum number of Cs+ ions that can be produced per joule of energy absorbed
by a sample of gaseous Cs atoms? (First ionization energy of Cs is 375.7 kJ/mol)
Selected Answer: 1.603 x 1018 Cs+ ions
Question 9
5 out of 5 points
Electronegativity __________ from left to right within a period and __________ from top to
bottom within a group.
Selected Answer: increases, decreases
Question 10
5 out of 5 points
What is the formula and name of the compound formed from the following ionic interaction:
the 2+ ion is the smallest with a filled d subshell; the anion forms from the smallest halogen?
Selected Answer: zinc fluoride
Question 11
5 out of 5 points
Which one of the following series is arranged in order of increasing value?
Selected Answer: The first ionization energies of oxygen, fluorine, neon
Question 12
5 out of 5 points
The only noble gas without eight valence electrons is __________.
Selected Answer: He
Question 13
In which set of elements would all members be expected to have very similar chemical
properties?
Selected Answer: O, S,
Se
Question 14
0 out of 5 points
Consider the following orderings.
I. Al < Si < P < S
II. Be < Mg < Ca < Sr
III. I < Br < Cl < F
Which of these give(s) a correct trend in atomic size? ONLY II
Selected Answer: I and II only
Question 15
5 out of 5 points
The halogens, alkali metals, and alkaline earth metals have __________ valence electrons,
respectively.
Selected Answer: 7, 1, and 2
Question 16
0 out of 5 points
Choose the wrong statement(s) among I, II and III:
I. Metals conduct electricity; nonmetals do not.
II.When metals and nonmetals form stable ions, nonmetal ions tend to have a positive charge,
while metal ions tend to have a negative charge.
III.Metal oxides are ionic and act as acids, while nonmetal oxides are nonionic and acts as bases.
II AND III WRONG
Selected Answer: All are wrong
Question 17
5 out of 5 points
Which property increases with increasing atomic number for both the alkali and the halogens?
Selected Answer: Atomic radius
Question 18
5 out of 5 points
Which of the following would have to lose two electrons in order to achieve a noble gas
electron configuration? O Sr Na Se Br
Selected Answer: Sr
Question 19
5 out of 5 points
Choose the correct rankings for these ions below in order of increasing size:
Selected Answer: Li+ < Na+ < K+
Rb+ < Se2- < Br-
F- < O2- < N3-
Question 20
5 out of 5 points
Which of the following does not have the ground-state configuration 1s22s22p6?
Selected Answer: Cl
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