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Molecules and Compounds Questions - All Grades

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Grade 9 Molecules and Compounds
Which of the following is NOT a compound?
  1. NaCl
  2. Cacl
  3. C
  4. KCl
  5. NaOH
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 6 Molecules and Compounds
What does C2O5 mean?
  1. 2 carbon atoms and 5 oxygen atoms
  2. 3 carbon atoms and no oxygen atoms
  3. 4 carbon atoms and no oxygen atoms
  4. 5 carbon atoms and 2 oxygen atoms
Grade 8 Molecules and Compounds
CaCO3 represents a chemical                .
  1. symbol
  2. subscript
  3. formula
  4. reaction
Grade 6 Molecules and Compounds
A(n)                 is a combination of atoms.
  1. atom
  2. molecule
  3. gas
  4. matter
Grade 6 Molecules and Compounds
What is a type of matter made of a combination of elements?
  1. molecule
  2. element
  3. compound
Graduate Molecules and Compounds
Which symbol represents water?
  1. H2O
  2. H3O
  3. C2O
Grade 8 Molecules and Compounds
A compound differs from a mixture in that a compound always has a                            .
  1. homogeneous composition
  2. maximum of two components
  3. minimum of three components
  4. heterogeneous composition
Grade 6 Molecules and Compounds
When two or more atoms of elements join together, they create                .
  1. atoms
  2. electrons
  3. protons
  4. molecules
Grade 6 Molecules and Compounds
                are composed of two or more different elements.
  1. Compounds
  2. Molecules
  3. Mixtures
Grade 8 Molecules and Compounds
Select the answer that is a compound.
  1. Gold
  2. Chicken noodle soup
  3. Table salt
  4. Rocky road ice cream
Grade 6 Molecules and Compounds
Compounds are pure substances made of
  1. two or more kinds of atoms.
  2. two of the same type of atom.
  3. more than 5 types of atoms.
  4. mixtures.
Grade 6 Molecules and Compounds
When two or more elements combine chemically, which of the following would be formed?
  1. DNA
  2. atoms
  3. compounds
  4. molecules
Grade 10 Molecules and Compounds
Water acts as a solvent of ionic compounds because                                                    .
  1. water molecules are polar
  2. water takes the shape of its container
  3. water is found in three states of matter
  4. water is a liquid over a wide range of temperatures
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