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Ch. 2 (Chemistry of life) review questions; Name: _________________________; Score: ______
1. Assuming atomic number is 6 and atomic mass is 12 for Carbon. Calculate carbon atom’s
numbers of proton, neutrons, and electrons, respectively.
Questions 2-4 (Matching)-- Match the following terms to their respective statement below.
A. Ionic bond
B. Covalent bond
C. Hydrogen bond
2. _______ Two hydrogen atoms share valence electrons to form a hydrogen molecule
3. _______ A weak attraction between a slightly positive hydrogen atom in one molecule and a
slightly negative oxygen or nitrogen atom in another
4. _______ The attraction of a cation to an anion
Questions 5-7 (Matching)-- Match the following terms to their respective statement below.
A. Decomposition reaction
B. Synthesis reaction
C. Exchange reaction
5. _______ Two or more small molecules combine to form a larger one
6. _______ Two molecules exchange atoms or groups of atoms
7. _______ A large molecule breaks down into two or more smaller ones
8. The arrangement of a polypeptide into a fibrous or globular shape is called its _____ structure.
(A) primary; (B) secondary; (C) tertiary; (D) quaternary; (E) none of the above
9. When an atom gives up an electron and acquires a positive charge, it is called a/an _____.
10. Name this functional group (--OH).
Answer: l
11. Name this functional group (--NH2).