Free sample activity for counting atoms in chemical formulas! Formulas contain a mix of subscripts, parentheses, & coefficients.These self-checking activities are ideal for independent learners, homeschoolers, online teachers/tutors, and are effective, learning focused, homework assignments for in-school learners. Auto-grading and data collection timesavers for classroom teachers!Each Counting Atoms Extra Practice Activity will reinforce knowledge of elements, element symbols, and chemical