For a substance composed of molecules, the chemical formula tells you the number of atoms in each molecule. Each atomic symbol in the chemical formula represents one atom, unless the symbol is followed by a subscript. The subscript shows how many atoms the symbol represents. Select the model that represents a molecule of the substance with the chemicalformula \( \mathrm{H}_{2} \mathrm{O}_{2} \).

Water's chemical formula, \( \mathrm{H}_{2} \mathrm{O}_{2} \), indicates it is composed of two hydrogen (H) atoms and two oxygen (O) atoms. This means each molecule has the potential to create hydrogen bonds, making it a crucial part of many biological and chemical processes. Imagine this molecule as a tiny assembly of diverse little spheres—two small light spheres representing hydrogen atoms and two larger ones representing oxygen atoms, all held together in a unique formation that gives rise to its properties. Now, if you're visualizing \( \mathrm{H}_{2} \mathrm{O}_{2} \) for a science fair project, consider using colorful beads or clay! You could represent hydrogen with small blue beads (two) and oxygen with larger red ones (two) to create a physical model. This hands-on approach not only makes learning fun but can also help highlight how molecular structures play a significant role in various chemical reactions, like the role of hydrogen peroxide in disinfectants!