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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 [math]C_2O_5[/math] 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
[math]CaCO_3[/math] 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. [math]H_2 O[/math]
  2. [math]H_3 O[/math]
  3. [math]C_2 O[/math]
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 6 Molecules and Compounds
Water [math](H_2O)[/math] and salt [math](NaCl)[/math] are what?
  1. Elements
  2. Compounds
  3. Mixtures
  4. Solutions
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