A student performed an investigation to see what would happen when an iron nail is added to a copper sulfate solution Before and after photos of the reactants and products are shown in Chart 1. Use information from Chart 1 to answer the
question below.
True or False.
The properties of the reactants in this investigation did not change.
True
False

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the answer is true. hope it .

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.