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प्रश्न
Select the correct answer from the choice given below to complete the sentence :
An example of a monoatomic molecule is ___________.
विकल्प
hydrogen
helium
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उत्तर
An example of a monoatomic molecule is helium.
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संबंधित प्रश्न
Fill in the blank
A pure substance has definite.................. and constant ..............
Correct the following statement:
CO and Co both represents cobalt.
State four differences between compounds and mixtures.
Give one use of the following substance:
Coal
Indicate whether the following statement is true or false:
All elements are artificially prepared
Complete the statement – an element is a pure substance made up of ____________ atoms.
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 |
Differentiate between elements and compounds.
How are elements classified?
Give the chemical formula for cane sugar.
