Science and Technology, Class 9 · Unit 14
Molecular Formula
Molecules · Criss-cross method · Molecular weight
By the end of this lesson you can
🧪say what a molecule and a formula are
✖️write formulas by criss-cross
🔍read facts from a formula
⚖️find atomic and molecular weight
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A molecule is the smallest part of a compound, and a molecular formula is the group of symbols that stands for it.