Question

C. Write true or false for each statement. Rewrite the false statements correctly.
1. Symbols were first used by Swedish chemist, John Dalton.
2. To study the nature of different chemicals requires knowledge of the fundamental building blocks of
all chemicals, the molecule.
3. Chemical reactions always involve the input or release of energy.
4. The molecular formula of baking soda is Na,O,
5. The law of constant proportion is involved in balancing of a chemical equation.
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Answer 1

Answer:

1. true.

2. false

3. false.

4.false.

5. true

Answer 2

Answer:

1. true
2. false
3. true
4. false
5. false