1.1. in 1671, Robert Boyle discovered and described the reaction between iron filings and dilute acids, which results in the production of hydrogen gas.
2. elctronic configuration
2.1. 1
3. Atomic model of hydrogen
4. special characteristic
4.1. it is the lightest element
5. introduction
5.1. Hydrogen is a chemical element with symbol H and atomic number 1.
6. physical properties
6.1. colourless
6.2. odourless
6.3. tasteless
6.4. non-toxic
6.5. highly combustible
6.6. Color colorless
6.7. Phase (at STP) gas
6.8. Melting point 13.99 K (−259.16 °C, −434.49 °F)
6.9. Boiling point 20.271 K (−252.879 °C, −423.182 °F)
