Wesley Minor
Mock Exam 2
1. A given molecule has a central atom with no nonbonding pairs of electrons and three bonding pairs. What is the geometry of this molecule?
A. linearB. tetrahedral C. trigonal pyramidalD. trigonal planar E. bent
2. Which molecule doesn’t have to follow octet rule?
A. carbonB. heliumC. chlorineD. lithiumE. Argon
3. Which of the following is correct for a halogen?
A. Xs6Xp2B. Xs2Xd2Xp6 C. Xs2Xp6 D. Xs2Xd10Xp5E. Xs2Xp5
4. What is the chemical formula for silver (I) sulfide?
A. Ag2SB. AgS2C. S1S2D. Sn2SE. None of these
5. Which of the following subshells does not exist?
A. 3s B. 2s C. 2d D. 4f E. 1s
6. Which of the following is best described as a covalent compound?
A. Na2S B. SI2 C. NiSeD. CaOE. KCl
7. What is the chemical formula for nitrogen trichloride?
A. N3Cl2B. NCl2C. NiCl3D. Cl3NE. None of these
8. How many electrons are shared in molecular oxygen?
A. 1B. 2C. 3D. 4D. 6
9. How many valence electrons does aluminum have?
A. 1B. 2C. 3D. 4D. 6
10. How many electrons does beryllium have?
A. 1B. 2C. 3D. 4D. 6
11. How many neutrons does cobalt have?
A. 32B. 59C. 27D. 44E. None of these
12. What is the geometry of NI3?
A. pyramidal B.trigonal planarC. tetrahedralD. linear E. None of these
13. How many nonbonding electrons are in carbon monoxide?
A. 2B. 4C. 6D. 8E. 10
14. 1s22s22p63s23p64s13d10 is the electron configuration for what?
A. CuB. ZnC. GaD. CoE. Ag
15. How many bonds would be expected in a molecule made up of two nitrogen atoms and two fluorine atoms?
A. two B. three C. four D. five E. six
16. Which of the following best describes how sulfur is able to have more than 8 electrons in their valence shell?
A. Argon has 18 electrons in its valence shell, so sulfur is able to match that number
B. Sulfur is able to obtain electrons from atoms with smaller values for electronegativity
C. Sulfur’s outermost electrons are in the 3rd shell, so is able to use the 3d subshell orbitals
D. Sulfur readily oxidizes other elements to gain additional electrons
E. Sulfur is a metalloid, so is able to take on metal characteristics of expanded octets
17. Which of the following is the proper chemical formula for calcium sulfite?
A. Ca2(SO3)2 B. CaSC. CaSO4 D. CaSO3 E. Ca2S2
18. If an atom ionizes and goes from +2 to + 3, what has happened?
A. The atom has gained a neutron
B. The atom lost a proton
C. The atom gained a proton
D. The atom has lost an electron
E. Both C & D
19. Is tellurium 130 an
A. ion B. isotope C. diatomicD. None
20. The VSEPR model describes what phenomenon?
A. The gain or loss of electrons in a chemical reaction
B. The unequal sharing of electrons in a covalent bond
C. How individual atoms gain or lose electrons to form ions
D. Which atoms will come together to form compounds, and in what ratio
E. Forces that determine the shape of a molecule