Want to see correct answers?
Login or join for free!
  Chemistry Worksheets
Looking for Chemistry worksheets?
Check out our pre-made Chemistry worksheets!
Share/Like This Page
Filter By Grade

Eighth Grade (Grade 8) Molecules and Compounds Questions

You can create printable tests and worksheets from these Grade 8 Molecules and Compounds questions! Select one or more questions using the checkboxes above each question. Then click the add selected questions to a test button before moving to another page.

Previous Page 1 of 4 Next
Grade 8 Molecules and Compounds
Water is an example of a(n)                      .
  1. element
  2. homogeneous mixture
  3. compound
  4. heterogeneous mixture
Grade 8 Molecules and Compounds
In the chemical formula [math]CO_2[/math], the subscript 2 shows which of the following?
  1. There are two oxygen ions.
  2. There are two oxygen atoms.
  3. There are two [math]CO_2[/math] molecules.
  4. There are two [math]CO_2[/math] compounds.
Grade 8 Molecules and Compounds
What is the chemical name for the compound [math]Na_2S[/math]?
  1. sodium fluoride
  2. magnesium sulfide
  3. lithium oxide
  4. sodium sulfide
Grade 8 Molecules and Compounds
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 8 Molecules and Compounds
What are the “bones” of molecules?
  1. Cells
  2. Nuclei
  3. Atoms
  4. Femurs
Grade 8 Molecules and Compounds
Which of the following is a covalently bonded molecule?
  1. [math]Cl_2 [/math]
  2. [math]air[/math]
  3. [math]Ne[/math]
  4. [math]NaCl[/math]
Grade 8 Molecules and Compounds
What is the word to describe oil repelling or pushing away from water?
  1. Hydrophobic
  2. Agoraphobic
  3. Waterphobic
  4. Claustrophobic
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 of the same compound have different properties.
  4. It can be represented by a chemical formula.
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 8 Molecules and Compounds
Grade 8 Molecules and Compounds
Grade 8 Molecules and Compounds
[math]CaCO_3[/math] represents a chemical
  1. symbol
  2. subscript
  3. formula
  4. reaction
Grade 8 Molecules and Compounds
Previous Page 1 of 4 Next
You need to have at least 5 reputation to vote a question down. Learn How To Earn Badges.