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Seventh Grade (Grade 7) Molecules and Compounds Questions

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Grade 7 Molecules and Compounds
A chemical combination of two or more atoms is a(n)                .
  1. volume
  2. molecule
  3. chemical bond
  4. isotope
Grade 7 Molecules and Compounds
A molecule of sugar contains carbon and                    .
  1. hydrogen
  2. oxygen
  3. sodium
  4. hydrogen and oxygen
Grade 7 Molecules and Compounds
The elements sodium and chlorine make up table salt.
  1. True
  2. False
Grade 7 Molecules and Compounds
Synthetic rubber polymers supply over 60% of the world's rubber needs. Which of the following would be useful in improving the process for making synthetic rubber?
  1. Improvement in the packaging of rubber products.
  2. More information about the possible products that might use synthetic rubber
  3. Producing a more disease resistant variety of rubber tree.
  4. A better understanding of how cross links form in rubber polymers.
Grade 7 Molecules and Compounds
Which of the following is a compound?
  1. brass
  2. water
  3. air
  4. blood
Grade 7 Molecules and Compounds
Which of the following choices sequences the parts of matter from smallest to largest correctly?
  1. atom → element → compound
  2. atom → compound → element
  3. element → atom → compound
  4. element → compound → atom
Grade 7 Molecules and Compounds
Compounds are made up of one element.
  1. True
  2. False
Grade 7 Molecules and Compounds
Ions of opposite charges attract one another to form electrically neutral compounds called                  .
  1. ionic compounds
  2. molecular bonds
  3. magnets
  4. none of the above
Grade 7 Molecules and Compounds
What is the chemical symbol for salt?
  1. NaCl
  2. H2O
  3. HCl
  4. N2O3
Grade 7 Molecules and Compounds
Two types of compounds are                    and                   .
  1. positive; negative
  2. molecular; ionic
  3. neutral; negative
  4. ionic; magnetic
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