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प्रश्न
Tick (√) the correct alternative from the choice given for the following statement.
The most abundant elements in the universe are
विकल्प
neon and argon
hydrogen and helium
aluminium and copper
oxygen and nitrogen
उत्तर
hydrogen and helium
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संबंधित प्रश्न
Classify the following substances into compounds and mixtures:
Tick the most appropriate answer
Solutions are
- heterogeneous mixtures.
- compounds
- homogeneous mixtures.
- elements
Give two examples of the following.
Elements which are liquids
Mention three gaseous elements and write their molecular formulae
Match the Columns:
| Column A | Column B | ||
| (a) | Metals | (i) | Non-Reactive |
| (b) | Molecules | (ii) | Brittle |
| (c) | Non-Metals | (iii) | Lustrous |
| (d) | Noble Gases | (iv) | Smallest unit of Compound |
Give the name of the radical - SO4
______ is the life-giving element is the air.
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal other than carbon that shows allotropy.
Give an account of elements known to us.
How are elements classified?
