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 - Challenge Me

NameDate

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

A gas sample holds 5 CO₂ molecules and 2 CO molecules. How many oxygen atoms does it hold, Bo?
A gas sample holds 6 CO₂ molecules and 6 CO molecules. How many oxygen atoms does it hold, Esme?
3.
How is penta- + oxide written, Kira?
- Pentoxide
- Pentoxyde
- Pentaoxide
4.
In covalent names, how does the second element's name end, Luz?
- In -ide
- In -ate
- In -ite
5.
Milo names MgCl₂ magnesium dichloride. Agree or disagree?
- Disagree: ionic names skip prefixes
- Agree: it has two chlorines
- Agree: prefixes give counts
6.
Noah names Al₂O₃ dialuminum trioxide. Agree or disagree?
- Agree: oxides take prefixes
- Disagree: it is aluminum oxide
- Agree: 2 Al and 3 O need prefixes
7.
Pia says carbon monoxide and carbon dioxide are the same compound. Agree or disagree?
- Agree: both are carbon and oxygen
- Disagree: they differ in oxygens
- Agree: both are gases
8.
How do carbon monoxide and carbon dioxide differ, Ren?
- By one carbon atom
- By one oxygen atom
- They don't differ
9.
How many atoms in all are in one sulfur dioxide molecule, Tala?
- 4
- 3
- 2
10.
How does dinitrogen monoxide's formula differ from nitrogen dioxide's, Zee?
- They are the same
- N₂O₂ against NO
- N₂O against NO₂

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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