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प्रश्न
Fill in the blank
_________ refers to the number of atoms in the molecule of an element
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उत्तर
Atomicity refers to the number of atoms in the molecule of an element
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संबंधित प्रश्न
Give two applications of chromatography.
Give the symbols of: Carbon, calcium, copper, chlorine, cobalt, argon.
Fill in the blank
The most abundant element in the atmosphere is _______.
Indicate whether the following statement is true or false:
Metals can be polished.
Complete the statement with the correct words.
Acid’s are chemicals which are _____ in taste and derived from plants and ________.
Match the statements in List I – 1 to 10 correct answers in List II-A to J.
| List I | LIst II | ||
| 1 | Fluorine and chlorine | A | Nitrogen |
| 2 | A diatomic molecule | B | Boron |
| 3 | A molecule containing the elements hydrogen and oxygen. | C | Reactants |
| 4 | A metalloid - showing properties of both metals and non-metals. | D | Chemical Formula |
| 5 | The term used for the substances which take part in the chemical reaction | E | Halogens |
| 6 | The term represents a substance by means of symbols. | F | Water |
| 7 | The term used for the substances formed as a result of a chemical reaction | G | Nitric Acid |
| 8 | A compound containing one atom of zinc and two atoms of chlorine. | H | Products |
| 9 | The chemical name for nitrogen monoxide. | I | Phosphorus |
| 10 | A polyatomic molecule. | J | Zinc Chloride |
Select the correct answer from the choice given below.
An impure substance
Elements are made up of______ kinds of atoms.
Differentiate metals and non-metals.
Assertion: Air is a mixture of elements only.
Reason: Only nitrogen, oxygen and neon gases exist in air.
