Q1
What does a chemical formula show?
AElements and their ratio in a compound
BOnly the compound's name
COnly its colour
DNothing useful
ICSEClass 8 (ICSE)ScienceCh 13 · Topic 1
Language of Chemistry
The language of chemistry uses symbols, formulas, and balanced equations to represent substances and chemical reactions precisely.
Core concept
A chemical formula shows the elements and their ratio in a compound, like CO₂ showing one carbon and two oxygen atoms.
How it works
A balanced chemical equation has equal numbers of each type of atom on both sides, following the law of conservation of mass.
Why it matters
For example, 2H₂ + O₂ → 2H₂O is balanced, with 4 hydrogen and 2 oxygen atoms on each side.
Key detail
Understanding chemical language allows precise communication about substances and reactions among scientists worldwide.
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• A chemical formula shows elements and their ratio.
• CO2 has one carbon and two oxygen atoms.
• A balanced equation has equal atoms on both sides.
• This follows the law of conservation of mass.
• 2H2+O2 → 2H2O is balanced.
• It has 4 hydrogen and 2 oxygen on each side.
• Chemical language enables precise global communication.
• Balancing equations is an essential chemistry skill.