Answer: Because of the arrangement of atoms in a compound. A compound has different physical and chemical properties than corresponding elements because of change in identity. For Example: Hydrogen and oxygen are gases, but the compound formed by the combination of these two that is water is liquid.
Q. How do you classify a compound?
Chemical compounds may be classified according to several different criteria. One common method is based on the specific elements present. For example, oxides contain one or more oxygen atoms, hydrides contain one or more hydrogen atoms, and halides contain one or more halogen (Group 17) atoms.
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Q. What are 4 unique characteristics of compounds?
- Components in a compound are present in a definite proportion.
- It has a homogeneous composition.
- Particles in a compound are of one kind.
- A compound is made up of one or more atoms of the same or different elements.
- In a compound the elements are present in a fixed ratio by mass.
Two things
Q. Why does a compound have characteristic properties?
Q. What is the uses of compound?
List of Chemical compounds- their common name, formula and uses
| Common Name | Chemical Compounds/Elements | Uses |
|---|---|---|
| Washing Soda | Sodium carbonate decahydrate | It is used in commercial detergent mixtures to treat hard water. |
| White Vitriol | Zinc Sulphate | It is used for preserving skins and wood. |
Q. What are the compounds in our daily life?
List of Chemicals used in daily life
| S:No | Common name of the Chemical | Molecular Formula and IUPAC name |
|---|---|---|
| 3 | Detergent | Sodium sulphate, sodium hydroxide and phosphatecompounds |
| 4 | Toothpaste | Calciuym carbonate, sodium flouride |
| 5 | Salt | NaCl; Sodium Chloride |
| 6 | Vinegar | C2H4O2 acetic acid, ethanoic acid |
Q. What are the six most important chemical elements of life?
The six most common elements of life on Earth (including more than 97% of the mass of a human body) are carbon, hydrogen, nitrogen, oxygen, sulphur and phosphorus.
