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प्रश्न
Complete the statement – an element is a pure substance made up of ____________ atoms.
विकल्प
identical
different
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उत्तर
An element is a pure substance made up of identical atoms.
संबंधित प्रश्न
Classify the following substances into compounds and mixtures:
Classify the following substances into elements and compounds
Mercury, sulphur, sugar, water, sand, gold, carbon, oxygen, alcohol, iron, marble, baking soda.
Give one use of the following substance:
Iron
Give reason: Graphite is used to make a lead of the pencils.
Fill in the blank
A metal which is a liquid at room temperature is _______.
Define the terms elements, compounds & mixtures with a view to show their basic difference.
Differentiate between homogenous & heterogeneous mixtures.
Give an example of two liquids which form homogenous.
Give a reason for the following statement :
Brass & bronze are examples of mixtures, while copper sulphate & lead nitrate are examples of compounds.
Complete the table by writing the symbols of the following elements
| Element | Symbol |
| Aluminum | Al |
| Nickel | |
| Bromine | |
| Helium | |
| Magnesium |
