Periodic table and davy lamp: what they have in common

1. Step 1. Periodic table — uses — Atomic theory. A classification of atoms.
2. Step 2. Atomic theory — is used in — Chemical reaction. A rearrangement of atoms.
3. Step 3. Chemical reaction — is used in — Acetylene. Calcium carbide + water.
4. Step 4. Acetylene — is used in — Carbide lamp. Burning acetylene.
5. Step 5. Carbide lamp — evolved from — Davy lamp. Miners’ lamps.

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