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Element and Compounds — CHEMISTRY STD 6 — Question

ICSE BoardEnglish MediumSTD 6CHEMISTRYElement and Compounds5 Marks
Question
State three characteristics of a compound.
✓

Answer

Characteristics of a compound :
1. Compounds are made up of two or more elements. For example, the compound water is made up of the elements hydrogen and oxygen.
2. A compound is always made up of the same elements combined together in a fixed ratio. For example, in water, two elements hydrogen and oxygen are chemically combined together in a fixed ratio of two atoms of hydrogen to one atom of oxygen.
3. The properties of a compound are different from those of its constituent elements. For example, the element hydrogen can bum and the element oxygen helps in burning. However, the compound water, formed from hydrogen and oxygen, neither bums nor helps in burning. Hydrogen and oxygen are gases but their compound water is a liquid.
4. A compound is always homogenous, that is, all samples of a compound are identical in composition and have the same properties throughout.
5. It is not possible to separate the constituents of a compound by physical means.
6. Energy is usually given off or absorbed when a compound is formed.

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