9)Select the more metallic element from each pair of elements: Na or Mg; K or Rb
ID: 739994 • Letter: 9
Question
9)Select the more metallic element from each pair of elements: Na or Mg; K or Rb; Al or Si.A. Mg; Rb; Si
B. Na; Rb; Al
C. Na; K; Al
D. Mg; K; Al
10)Select the false statment below.
A. The copper(I) ion is diamagnetic.
B. The Fe3+ ion has 5 unpaired electrons.
C. The S2-, Ca2+, and Cl1- ions are isoelectronic ions.
D. The Ti2+, K1+, and P3- ions are isoelectronic ions.
11)Select the false statement below concerning period 4 transition elements.
A. The vanadium atom is more paramagnetic than the zinc atom.
B. The scandium atom has 18 inner/core electrons, 2 outer electrons, and 3 valence electrons.
C. The chromium atom has a half-filled d subshell.
D. The titanium atom has more unpaired electrons than the nickel atom.
12)Consider the phosphorus atom and select the false statement below.
A. The phosphorus atom has a half-filled outer p subshell.
B. The phosphorus atom is paramagnetic.
C. The phosphorus atom has 12 inner/core electrons and 3 valence electrons.
D. The condensed electron configuration of the phosphorus atom is [Ne]3s23p3.
13)The photon emitted or absorbed during an electronic transition between n = 2 and n = 4 in a hydrogen atom has a wavelength in the visible portion of the electromagnetic spectrum and an energy that is greater than a similar electronic transition between n = 3 and n = 5 in a hydrogen atom.
True
False
14)Consider the electronic transition from n = 4 to n = 1 in a hydrogen atom, and select the correct statement below.
A. A photon of 122 nm wavelength and 1.64x10-18 J energy was emitted from the hydrogen atom in this electronic transition.
B. A photon of 97 nm wavelength and 2.05x10-18 J energy was absorbed by the hydrogen atom in this electronic transition.
C. A photon of 122 nm wavelength and 1.64x10-18 J energy was absorbed by the hydrogen atom in this electronic transition.
D. A photon of 97 nm wavelength and 2.05x10-18 J energy was emitted from the hydrogen atom in this electronic transition.
15)Which of the following statements is false?
A. NaO is more basic in aqueous solution than Al2O3
B. Al exhibits more metallic behavior than Na
C. Si has a greater (more negative) first electron affinity than Al
D. Si has a higher first ionization energy than Al
Explanation / Answer
B. Na; Rb; Al D. The Ti2+, K1+, and P3- ions are isoelectronic ions.
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