Download quiz 2 -- chemistry

Name:
__ 1.
What is the smallest unit of matter that cannot be divided into smaller units by chemical means?
__ 2.
List three subatomic particles and their charges (if any).
__ 3.
How many protons does the carbon on the right have? How many neutrons?
__ 4.
What charge do anions have?
__ 5.
How many covalent bonds are formed by carbon? Hydrogen? Nitrogen? Oxygen?
__ 6.
How do the isotopes 12C and 14C differ?
__ 7.
Arrange the following from strongest to weakest: Covalent, Hydrogen, Ionic.
__ 8.
What atom is the field of organic chemistry most concerned with?
__ 9.
What does hydrophobic mean?
__ 10. What bond type is responsible for water’s high heat of vaporation, high specific heat, & surface tension?
__ 11. Which of the following is most likely to be hydrophobic
a. Charged molecules
b. Polar molecules
c. Non-charged, non-polar molecules?
__ 12. If one adds an extra proton to a hydrogen atom, one obtains:
a. a hydrogen cation.
c. a hydrogen radioisotope.
e. heavy hydrogen
b. a hydrogen anion.
d. molecular hydrogen.
f. none of these
__ 13. A stable atom contains __ electrons in the first shell and __ electrons in its second shell.
a. 1 . . . 2
b. 2 . . . 4
c. 2 . . . 8
d. 4 . . . 10
e. 3 . . . 9
f. 4 . . . 18
__ 14. Which of the following is most inclusive?
a. atom
b. compound
c. molecule
d. proton
e. neutron
f. element
__ 15. Which of the following is the strongest bond in biological systems?
a. hydrogen
c. ionic
e. hydrophobic
b. triple covalent
d. double covalent
f. single covalent
__ 16. The affinity of an atom for its electrons is referred to as which of the following?
a. electronegativity
c. hydrophobicity
e. negative potential
b. oxidation potential
d. ionicity
f. aliphacity
__ 17. Nitrogen gas, which makes up about 79% of the air you breathe, is composed of two
molecules of nitrogen (atomic number 7) joined together in what type of bond?
a. hydrogen
c. ionic
e. hydrophobic
b. triple covalent
d. double covalent
f. single covalent
__ 18. Which of the following best depicts an amino group?
a. –SH2
b. –NH2
c. -COOH
d. -OH
e. R-CH2O
__ 19. Which of the following is the functional group of an alcohol?
a. –SH2
b. –NH2
c. -COOH
d. -OH
e. R-CH2O
__ 20. Which of the following molecules might be attracted to each other due to a hydrogen bond?
a. C-N : N-C
b. C-O : O-C
c. O-H : H-C
d. H-O : H-N
e. C-H : O-C
__ 21. Sodium (atomic number 11) would be expected to form what type of bond with chlorine
(atomic number 17)?
a. single covalent
c. hydrogen
e. hydrophobic interaction
b. double covalent
d. ionic
__ 22. Oxygen (atomic mass of 8) forms what type of bond with the two hydrogen atoms (atomic
mass of 1) in a water molecule?
a. hydrogen
c. ionic
e. hydrophilic
b. triple covalent
d. double covalent
f. single covalent
__ 23. Draw (using lines to indicate covalent bonds) C3H8.
__ 24. Draw (using lines to indicate covalent bonds) C3H6.
__ 25. Draw (using lines to indicate covalent bonds) C2H5O2N.