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प्रश्न
Tick (√) the correct alternative from the choice given for the following statement.
Gold is used to make jewellery because
पर्याय
it is dull
lustrous and attractive
highly reactive
very cheap
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उत्तर
lustrous and attractive
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संबंधित प्रश्न
Define the term: Element
Give two examples of Metals.
Find the atomicity of the Following molecule:
Aluminium Suiphide
Indicate whether the following statement is true or false:
Noble gases are high reactive
Tick (√) the correct alternative from the choice given for the following statement
A non-metal which is a good conductor of electricity.
Give the name of the radical - OH
‘The modern periodic table consists of elements arranged according to their increasing atomic numbers’. With reference to elements with atomic numbers 1 to 20 only in the periodic table – differentiate them into – metallic elements, metalloids, non-metals & noble gases.
State true of false. If false, give the correct statement.
Two different elements may have similar atoms.
Match the following.
| Atom | Building block of matter |
| Element | Atoms of different kinds |
| Compound | Atoms of the same kind |
| Molecule | Smallest unit of a substance |
Give an account of elements known to us.
