7) Sodium Reacts with Water to Form: ______

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7) Sodium Reacts with Water to Form: ______

Exam Review 4
Supplemental Instruction
Iowa State University / Leader: / Prina
Course: / Chem 177
Instructor: / Dr. Greenbowe
Date: / 11/16/2014

1) A bromine anion (Br-) has ______valence electrons.
a) 7b) 8c) 6d) 5
2) Which of the following represents an acceptable possible set of quantum numbers?

a) 3,1,-2,+1/2b) 3,1,-1, 0c) 3,3,0,+1/2d) 3,1,-1,+1/2
3) Draw the Lewis structure for a chlorate ion [ClO3-] and write the formal charges on each atom.

4) [Ar] 4s2 3d10 4p2 is the electron configuration of ______
a) Geb) Asc) Snd) Sb
5) Which of the following is an isoelectronic series?
a) P2-, S2-,Cl-b) Na+, Mg2+, Nec) Li+, Be2+,Bd) N3-, N2-, N-
6) Which of the following violates Hund’s rule?

7) Sodium reacts with water to form: ______

8) Which of the following bonds is the longest?
a) tripleb) doublec) single d) all have equal lengths
9) Which of the following ions will have the smallest ionic radius?
a) Na+b) Al3+c) F-d) O2-

10) How many orbitals are present in the f subshell?
a) 1b) 3c) 5d) 7

11) Which of the following is NOT a metallic property?

a) good electrical conductivityb) low ionization energies c) tendency to form cations d) acidic oxides

12) Complete the Energy Level Diagram by drawing in the electrons in the ground state of a Cr atom.

13) What is the energy of the photon emitted when an electron n the 6th energy level drops to the 3rd energy level in a hydrogen atom? What is the frequency of this light?

14) Which of the following elements have the largest and smallest atomic radius?
AuWSFrNeZn

15) Which of the following elements have the highest and lowest electron affinity?
PbCSnSi

16) Circle the ion in each set below that will have the largest radius.
a) Cu+Cu2+
b) Cl-Cl5+Cl3+
17) Draw the Lewis Structure of FNO2 [Draw the resonance structures]

18) Draw the Lewis structure of SF6.

19) Write the electron configuration of Fe2+

20) Which atomic orbitals have two nodal surfaces?
a) 2s and 2pb) 2p and 3pc) 3s and 3pd) all p orbitals

21) The work function of a photoelectric material is the energy that a photon of light must possess to just secure the release of an electron from the surface of the material. The corresponding frequency of light is the threshold frequency. The higher the energy of the incident radiation, the more kinetic energy the ejected electrons have in moving away from the surface. The work function for the element mercury is equivalent to 435 kJ/mol of photons.
[mass of electron=9.1*10^-31 kg, h=6.626*10^-34Js, c=3*10^8 m/s]
a.) What is the threshold frequency?
b.) What is the wavelength of radiation of this frequency?
c.) Can the photoelectric affect be obtained with mercury using visible light?(Lowest visible light in 390 nm)
d.) What is the maximum velocity of the electrons ejected when light of wavelength 215 nm strikes the mercury?

Good Luck 