Share Year 11: Chemical Reactions 1.2
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What is a chemical reaction?
A process where substances change into new substances.
What are reactants?
The starting substances in a reaction.
What are products?
The new substances formed in a reaction.
Give one sign of a chemical reaction
Colour change Gas/bubbles Temperature change Solid forms
What does H₂O mean? (what atoms are present?)
2 hydrogen atoms and 1 oxygen atom.
What does CO₂ mean? (What atoms are present)
1 carbon atom and 2 oxygen atoms
CO =?
Carbon Monoxide
CO₂ = ?
Carbon Dioxide
O₂ = ?
2 oxygen atoms / oxygen gas.
Combustion needs = ?
Oxygen.
Mass is = ?
The amount of matter in something.
Atoms are = ?
Tiny particles that make up substances.
Mass can disappear in a reaction - T/F?
F
CO₂ has 2 carbon atoms - T/F?
F
A yellow flame is complete combustion - T/F?
F
Atoms are rearranged in reactions - T/F?
T
