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प्रश्न
Draw a labelled diagram of an atom including its nucleus, orbits & their contents.
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उत्तर
संबंधित प्रश्न
Name the technique that you use if only the solid component of a solution is required.
Give reason: A frying pan is made up of steel but its handle is made up of wood.
Fill in the blank
A diatomic gaseous element is _______.
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 |
Indicate whether the following statement is true or false:
Elements are made up of compounds
Tick (√) the correct alternative from the choice given for the following statement.
Atoms of different kinds combine to form molecules of
Differentiate between the terms –
elements, compounds & mixtures.
Elements are classified into – Metals – Non-metals – Metalloids – Noble gases. State which of A, B, C, D is a –
1. Metallic element
2. Non-metallic element
3. Metalloid
4. Noble gas.
A: Is non-malleable, non-ductile & a poor conductor of electricity ___________
B: Has lustre, is malleable and ductile & a good conductor of heat ___________
C: Is unreactive and inert and present in traces in the air _________
D: Shows properties of both metals and non-metals ___________
State four differences between – elements, compounds and mixtures with suitable examples.
Non-metal conducting electricity :______ :: Metal conducting electricity : Copper
