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Q 1/12
Score 0
The formation of an aluminum ion occurs when 3 electrons are removed. Which electron would require the most energy to remove?
120
3p because it is farther from the nucleus
3s because it experiences higher attractive forces
3s because it is filled before 3p
3p because it only has 1 electron in the orbital
Q 2/12
Score 0
The concentration of a red-colored solution of cobalt(II) ions needs to be determined. What spectroscopic technique would be the best choice?
30
infrared spectrometry because the solution is red
photoelectron spectroscopy because the electron arrangement is responsible for the color
mass spectrometry because knowing the mass can allow for calculation of concentration
UV-Vis spectrometry because the solution has a color
12 questions
Q.
The formation of an aluminum ion occurs when 3 electrons are removed. Which electron would require the most energy to remove?
1
120 sec
Q.
The concentration of a red-colored solution of cobalt(II) ions needs to be determined. What spectroscopic technique would be the best choice?
2
30 sec
Q.
The quantum mechanical atomic model replaced the Bohr atomic model because
3
120 sec
Q.
What is the average atomic mass of element X based on the data above?
4
120 sec
Q.
Why does chlorine gain an electron to become a chloride ion?
5
120 sec
Q.
The mass spectrum for an unknown element is shown above. According to the information in the spectrum, the atomic mass of the unknown element is closest to
6
120 sec
Q.
How many unpaired electrons are in the atom represented by the electron configuration above?
7
120 sec
Q.
The complete photoelectron spectrum of an element is given above. Which labeled peak corresponds to the 1s electrons and why?
8
120 sec
Q.
The atomic radii of the elements in the nitrogen group in the periodic table are given in the table above. Which of the following best helps explain the trend of increasing atomic radius from N to Bi ?
9
120 sec
Q.
Which of the following best helps to explain why the atomic radius of K is greater than that of Br?
10
120 sec
Q.
Which of the following best helps explain why an atom of Rb gas more easily loses an electron in a chemical reaction than an atom of Li gas?
11
120 sec
Q.
Rb reacts with O in a mole ratio of 2 to 1 , forming the ionic Rb2C compound . Which of the following elements will react with O in a mole ratio of 2 to 1 , forming an ionic compound, and why?
