Note: As “Ta” is not a specific chemical substance, I will take Hydrogen (H2) as an example.
- Definition of Hydrogen
Hydrogen is a chemical element with the symbol H and atomic number 1. It is the lightest and most abundant chemical element in the universe, accounting for approximately 75% of the universe’s visible mass.
1.1. Names
1.1.1. Common name: Hydrogen
1.1.2. English name: Hydrogen
1.2. Atomic mass: 1.00784 u
1.3. Atomic weight: 1.00794 u
1.3.1. Molecular structure: Each hydrogen molecule consists of 2 hydrogen atoms combined.
1.4. Ion structure: Hydrogen can form H+ ions when it loses an electron.
- Properties of Hydrogen
2.1 Physical properties of Hydrogen
State: Gas
Color: Colorless
Odor: Odorless
pH: 7 (in water)
2.2 Chemical properties of Hydrogen: Hydrogen can react with many other chemical elements, forming various compounds.
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Common chemical reactions with Hydrogen
Metal reaction: 2Na + H2 -> 2NaH
Acid reaction: H2 + HCl -> 2HCl
Non-metal reaction: H2 + O2 -> 2H2O
Reaction with salt: H2 + 2NaCl -> 2Na + 2HCl -
Preparation of Hydrogen
4.1 Laboratory preparation of Hydrogen: Hydrogen is usually prepared from the reaction of acids and metals.
4.2 Industrial preparation of Hydrogen: On an industrial scale, Hydrogen is typically produced from the chemical reaction of methane gas with steam.