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Molecules and Compounds Questions - All Grades

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Grade 10 Molecules and Compounds
What is the correct name for the compound [math]MgO[/math]?
  1. magnesium trioxide
  2. dimagnesium trioxide
  3. magnesium oxide
  4. magnesium oxygen
Grade 7 Molecules and Compounds
Grade 9 Molecules and Compounds
Which of these represents a formula for a chemical compound?
  1. [math]H[/math]
  2. [math]C[/math]
  3. [math]H_2O[/math]
  4. [math]P[/math]
Grade 8 Molecules and Compounds
Which of the following is NOT a characteristic of a compound?
  1. It has different properties from the elements that formed it.
  2. It is a pure substance made of two or more elements.
  3. Different samples have different properties.
  4. It can be represented by a chemical formula.
Grade 8 Molecules and Compounds
Hydrogen Gas is diatomic. It is written as which formula?
  1. [math]H[/math]
  2. [math]He_2[/math]
  3. [math]H_2[/math]
  4. [math]He[/math]
Grade 9 Molecules and Compounds
A single water molecule is held together by                        .
  1. polar covalent bonds
  2. nonpolar covalent bonds
  3. hydrogen bonds
  4. ionic bonds
Grade 7 Molecules and Compounds
Grade 8 Molecules and Compounds
What is the chemical name for the compound [math]NaS[/math]?
  1. sodium fluoride
  2. magnesium sulfide
  3. lithium oxide
  4. sodium sulfide
Grade 10 Molecules and Compounds
What is the formula for carbon tetrafluoride?
  1. [math]C_4F_4[/math]
  2. [math]CF_4[/math]
  3. [math]CF[/math]
  4. [math]C_4F[/math]
Grade 8 Molecules and Compounds
In chemistry, the image shown below is called
Structural Formula - Aldehyde
  1. a structural formula
  2. a chemical equation
  3. an empirical formula
  4. an electron-dot diagram
Grade 5 Molecules and Compounds
When two or more elements join together, they create
  1. atoms
  2. electrons
  3. protons
  4. molecules
Grade 10 Molecules and Compounds
What is the correct name for the following compound: [math]SO_3[/math]?
  1. monosulfur oxide
  2. monosulfur trioxide
  3. sulfur trioxide
  4. sulfoxide
Grade 10 Molecules and Compounds
What is the chemical formula for dinitrogen heptafluoride?
  1. [math]N_7F_2[/math]
  2. [math]N_2F_7[/math]
  3. [math]NF_12[/math]
  4. [math]N_2F_9[/math]
Grade 6 Molecules and Compounds
When two or more elements combine chemically
  1. DNA
  2. atoms
  3. compounds
  4. molecules
Grade 6 Molecules and Compounds
The smallest unit of many compounds
  1. molecule
  2. atoms
  3. element
  4. DNA
Grade 6 Molecules and Compounds
Grade 8 Molecules and Compounds
Which of the following is NOT a characteristic of a compound?
  1. It has different properties from the elements that formed it
  2. It is a substance made of two or more elements
  3. It keeps the properties of the elements that make it up
  4. It can be represented by a chemical formula
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