Gen Chem Exam 2 Final Review

What is the energy of one photon of microwave radiation with a wavelength of 0.158 m

1.26x10^-24 J

Consider the cyclobutadiene structure shown below. How many pi bonds are there?

2

What is the wavelength of electromagnetic radiation which has a frequency of 5.732x10^14 s^-1

5.230x10^-7 m

Which bond is the most polar

H-O

Arrange the following in terms of decreasing electronegativity values P, O, As, S

O>S>P>As

Which of the correct electron configuration for a cobalt atom

[Ar] 4s2 3d7

Based on the Aufbau principle and other applicable guiding principles, what electron configuration would one reasonably expect to find for technetium (z=43)

[Kr] 5s2 4d5

The molecular geometry of the SeF4 molecule is best described as

distorted tetrahedral

The atoms in the oxygen molecule O2 are held together by a

double covalent bond

Which of the following gives a possible quantum number assignment for the last electron added to the chlorine atom when developing the electron configuration using the Aufbau principle?

n l m1 m2 3 1 0 1/2

A possible set of quantum numbers for an electron in the partially filled subshell in a germanium atom in its ground state configuration would be

n l m1 m2 4 1 -1 1/2

An unidentified element is known to have an electron configuration, [X] ns^2, in its ground state. The element must be in the same family as

radium

Draw a Lewis structure for the NH3 molecule. What is the set of hybrid orbitals used by the nitrogen atom for bonding?

sp3

What hybrid orbitals are used by sulfur in the sulfur tetrafluoride molecule

sp3d

Application of the concepts of the VSEPR theory, suggests that the shape of the SO3 molecule is

triangular planar

The bond angle in Cl2O is expected to be approximately

109.5 degrees

What is the max number of electrons that can fill all of the orbitals of a f subshell?

14

An arsenic atom has how many valence electrons

5

Based on the Lewis structure, the number of electron domains in the valence shell of the xenon atom in the XeF2 molecule is

5

The Lewis symbol for the nitrogen atom has ____ valence electrons. The number of covalent bonds which nitrogen forms in order to complete its valence its valence shell and obey the octet rule is ____

5, 3

Calculate the frequency of visible light having a wavelength of 464.1 nm

6.460x10^14 s^-1

Which atom has the electron configuration of [Ar]4s2 3d10 4p3

As

Which of these examples is a polar molecule

BrF5

Which atom has the smallest radius (Ca, Ba, Mg, C, K)

C

Based on conclusions from application of the VSEPR theory, which one of the following is linear

HCN

Bromine tends to form an ion which has the electron configuration of a noble gas. What is the symbol of that noble gas?

Kr

Which atom has the smallest first ionization energy (Ne, Rb, O, Na, Al)

Rb

Which of these compounds is most likely to be covalent

SF4

Give the ground state electron configuration and number of unpaired electrons for V3+

[Ar] 3d2; 2 unpaired electrons

A correct description for the electron configuration of a chromium atom is

[Ar] 4s1 3d5, paramagnetic

Application of the concepts of VSEPR theory leads to the prediction that the shape of the XeOF4 molecule is

square pyramidal

Bonding in the hydrogen chloride molecule can be explained by the valence bond theory in terms of an overlap between

the 1s orbital of the hydrogen atom and the 3p orbital of the chlorine atom

On comparing the two molecules, SbCl5 and IF5, VSEPR theory reveals that

the IF5 is polar, while the SbF5 is non-polar