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प्रश्न
Write the names of elements from the following symbol:
Zn
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उत्तर
Zn- Zinc
संबंधित प्रश्न
Give two examples for the following: Metals
Differentiate between:
Homogenous and heterogenous substances
Answer the following question:
Why are copper and aluminium used to make electric wires?
Indicate whether the following statement is true or false:
Molecules can exist independently.
Complete the statement – an element is a pure substance made up of ____________ atoms.
Complete the statement given below by filling in the blanks with the correct words.
Atom contains ________ , with positively charged _____.
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 |
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 which is required for combustion.
Complete the table by writing the symbols of the following elements
| Element | Symbol |
| Aluminum | Al |
| Nickel | |
| Bromine | |
| Helium | |
| Magnesium |
Reason out
Elements are called semimetals.
