Pick the best answer for each of the following:
1. Which of the following is NOT a true statement concerning what happens in all chemical
reactions?
a) The ways in which atoms are joined together are changed
b) New atoms are formed as products
c) The starting materials are named reactants
d) The bonds of the reactants are broken and new bonds of the products are formed
e) In a word equation representing a chemical reaction, the reactants are written on the left and
the products on the right.
2. In the balanced chemical equation for the following reaction, what is the coefficient in
front of fluorine?
nitrogen trifluoride nitrogen + fluorine
a) 1 b) 2 c) 3 d) 5 e) 6
3. In order to predict whether or not a single-replacement reaction takes place, we need to
consult a chart which shows the
a) periodic table
b) activity series of metals
c) common ion chart
d) table of electronegativities
e) orbital energy level diagram
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