Grade 10 · Science · Chemistry

10th grade Name covalent compounds with prefixes worksheet

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Name covalent compounds with prefixes

Grade 10 Science Worksheet - Building Confidence

NameDate

Circle the best answer, or write your answer on the line.

Each sulfur dioxide molecule has 2 oxygen atoms. How many oxygen atoms are in 12 molecules, Bo?
Each dinitrogen monoxide molecule has 2 nitrogen atoms. How many nitrogen atoms are in 7 molecules, Esme?
3.
On the card, how many pairs does carbon share with each oxygen, Jun?
- One
- Four
- Two
4.
On the card, what does di- in dioxide tell you, Kira?
Use the picture in question 3.
- There are two bonds in the molecule
- There are two oxygen atoms
- There are two carbon atoms
5.
What number does the prefix tri- stand for, Milo?
- 4
- 3
- 2
6.
What number does the prefix tetra- stand for, Noah?
- 4
- 5
- 3
7.
What number does the prefix mono- stand for, Pia?
- 1
- 2
- 6
8.
What is the name of CO, Ren?
- Carbon monoxide
- Monocarbon oxide
- Carbon oxide
9.
What is the name of SO₂, Tala?
- Sulfur oxide
- Sulfur dioxide
- Disulfur oxide
10.
Using only the prefix rules, what would H₂O be called? (Chemists just call it water.) Zee decides.
- Dihydrogen monoxide
- Hydrogen dioxide
- Monohydrogen oxide

Name covalent compounds with prefixes. Every version has 10 questions, and the answer key prints on the second page.

I can use the prefixes mono- through hexa- to name compounds of two nonmetals.
I can skip mono- on the first element and spell monoxide and pentoxide correctly.
I can write formulas from covalent names and count atoms in molecules.
I can tell when to use prefixes (two nonmetals) and when not (ionic compounds).

Standard: none (TX)

covalent compound: A compound of nonmetals held by shared electrons

prefix: A word start that gives a number: mono-, di-, tri-

molecule: A group of atoms joined by covalent bonds

subscript: The small number after a symbol, giving its count

systematic name: The rule-based name, such as dihydrogen monoxide for water

Your child added. Each molecule has its own atoms, so multiply molecules × atoms per molecule.

Your child added the numbers. Atoms = molecules × atoms in one molecule.

Your child counted molecules, not oxygen atoms. Each CO₂ has 2 oxygens and each CO has 1.

What is the most common mistake with name covalent compounds with prefixes?

Your child added. Each molecule has its own atoms, so multiply molecules × atoms per molecule.

Are these 10th grade science worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

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