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

NameDate

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

Each carbon dioxide molecule has 1 carbon and 2 oxygen atoms. How many atoms in all are in 4 molecules, Ari?
Each water molecule has 2 hydrogen and 1 oxygen atom. How many atoms in all are in 5 molecules, Bo?
Each sulfur dioxide molecule has 1 sulfur and 2 oxygen atoms. How many atoms in all are in 6 molecules, Esme?
Read this first
Prefixes for covalent names (IUPAC)
prefix number
mono- 1
di- 2
tri- 3
tetra- 4
penta- 5
hexa- 6
4.
Using the table, which prefix means 5, Jun?
- hexa-
- tetra-
- penta-
5.
Using the table, what is the formula of sulfur hexafluoride, Kira?
- SF₅
- S₆F
- SF₆
6.
Using the table, what is the formula of carbon tetrafluoride, Luz?
- C₄F
- CF₄
- CF₃
7.
What is the formula of carbon monoxide, Pia?
- CO₂
- CO
- C₂O
8.
Why is MgO named magnesium oxide and not magnesium monoxide, Ren?
- Magnesium has 2 electrons
- It is ionic, so no prefixes
- Mono- isn't a real prefix
9.
Why does carbon dioxide's name use a prefix, Tala?
- It joins two nonmetals
- Carbon is a metal
- Prefixes appear in each name
10.
Which kind of compound is SO₂, Zee?
- Covalent
- Metallic
- Ionic

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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