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प्रश्न
Elements are the______ form of pure substances.
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उत्तर
Elements are the simplest form of pure substances.
APPEARS IN
संबंधित प्रश्न
Tick the most appropriate answer.
How many times is a proton heavier than an electron?
- 1500
- 1800
- 1840
- none of these
Answer the following question:
Why are copper and aluminium used to make electric wires?
Answer the following question:
What do you understand by the statement: ‘metals are ductile and malleable’?
Tick (√) the correct alternative from the choice given for the following statement
The most ductile metal.
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 ___________
Who are my companions?
| Group 'A' | Group 'B' |
| 1. Stainless steel | (a) Non-metal |
| 2. Silver | (b) compound |
| 3. Bhajani mixture for milling | (c) Mixture |
| 4. Salt | (d) Element |
| 5. Coal | (e) Alloy |
| 6. Hydrogen | (f) Metal |
Select the correct answer from A, B, C, D & E for the statement given below :
A non-metal that is lustrous.
Select the correct answer from the choice given below to complete the sentence :
An example of a monoatomic molecule is ___________.
______ is a mixture of gases.
Complete the table:
| Element | Latin Name | Symbol |
| Mercury | ______ | Hg |
| Lead | Plumbum | ______ |
| Iron | ______ | Fe |
| Potassium | Kalium | ______ |
