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प्रश्न
What is meant by 2H and H2
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उत्तर
2H is two atoms of hydrogen. H2 is one molecule of hydrogen gas
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संबंधित प्रश्न
Define Elements.
Give two examples of the following.
Non-metals which are solids
Answer the following question:
Why are copper and aluminium used to make electric wires?
Indicate whether the following statement is true or false:
Metals reflect light and are good conductors of electricity
Classify substances into pure and impure substances in the form of a chart or tabulation.
Select the correct answer to the statement given below:
A non-metal which exists in the liquid state.
Elements are made up of______ kinds of atoms.
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.
Classify the substances given in Fig. 2.2 into elements and compounds
Complete the table by writing the symbols of the following elements
| Element | Symbol |
| Aluminum | Al |
| Nickel | |
| Bromine | |
| Helium | |
| Magnesium |
