By ALONZO REYES
2 questions
7th - 7th Grade
Science
Updated Sep 2024
Counting Atoms in Chemical Equations is a Grade 7 science worksheet that builds students’ ability to interpret chemical notation and determine how many atoms appear in a formula or equation. Students identify what a subscript modifies, recognize that a coefficient applies to an entire compound, and calculate the numbers of hydrogen, aluminum, and oxygen atoms shown in the items. The worksheet also includes a multiple-select question about identifying physical changes, giving students a brief opportunity to distinguish physical-change examples from other types of change. The seven-item set combines multiple-choice, multiple-select, fill-in-the-blank, and comprehension-video questions. It is designed for guided practice, independent review, or a quick check of students’ understanding of subscripts, coefficients, and atom counting. This free printable worksheet includes a complete answer key, making it practical for Grade 7 science instruction and assessment.
Worksheet settings
Font size
WorksheetsAnswer KeyBending of a wire.
, d)Chopping of wood.
The element right before it
6
12
This Grade 7 science worksheet helps students interpret subscripts and coefficients to count atoms in chemical formulas and equations. Its multiple-choice and fill-in-the-blank items ask students to identify what a subscript applies to, recognize that a coefficient applies to the entire compound, and determine the numbers of hydrogen, aluminum, and oxygen atoms.
First model how to read the number immediately before a compound and the subscript attached to an element, then work through one atom-counting example aloud. Use the worksheet’s questions about subscripts and coefficients as guided practice before students complete the hydrogen, aluminum, and oxygen counting items independently. Discuss why changing the part of the formula a number applies to changes the final atom count.
Students may apply a subscript to the element after it instead of the element immediately before it, or treat a coefficient as applying to only one element rather than the entire compound. They may also skip a subscript when counting hydrogen, aluminum, or oxygen atoms, or select only one example in the multiple-select physical-change question when two choices are required.
You can assign this worksheet as a printable PDF or as a digital quiz on Wayground. It includes a complete answer key for the multiple-select, multiple-choice, fill-in-the-blank, and comprehension-video items, and printable submissions can be graded by scanning student work with the Wayground for Teachers app.
In the worksheet’s Advanced Settings, adjust font spacing or font size to make the atom-counting questions and answer choices easier to read. You can also use a dyslexia-friendly font or translate the worksheet into another language when those options better support access to the subscripts, coefficients, and fill-in-the-blank prompts.
Wayground offers a broad collection of free printable worksheets and practice problems across subjects, with downloadable PDFs and answer keys to support essential skills and concepts. Browse more resources at https://wayground.com/en-us/worksheets.