Help your students build real understanding of atom inventory tool through ninety questions that move from basic recognition to genuine reasoning about chemistry concepts.
Sample questions include "For the reaction 2H₂ + O₂ -> 2H₂O, how many hydrogen atoms are there on the product side?", "In the equation Ca + O₂ -> CaO, what is the total number of calcium atoms after balancing?", and "What is the total number of hydrogen atoms in the balanced reaction 2C₂H₆ + 7O₂ -> 4CO₂ + 6H₂O?"
Each worksheet reviews the same core ideas from a different angle. Use them across a week or unit so students see the material three times without it ever feeling repetitive.
This set is part of a complete NGSS aligned chemistry unit. The unit also covers Law of Conservation of Mass, Balancing Equations Challenge, Stoichiometry Introduction, Mole Concept Quiz, Mass Mass Calculations, and Mole Mole Problems, all in the same three worksheet format, so your classroom routine stays familiar while the topic changes.
Suitable for Grade 9-12 chemistry classes, and for NGSS aligned review at any point in the school year. This set is aligned to NGSS standard HS-PS1-7.
