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प्रश्न
Name any two elements of group one and write their electronic configurations. What similarity do you observe in their electronic configurations? Write the formula of oxide of any of the aforesaid elements.
उत्तर
Two elements that belong to group 1 are lithium and sodium. The electronic configurations of these elements and the formulae of their oxides are mentioned in the table given below.
| Element | Symbol | Electronic Configuration | Formula of Oxide |
| Lithium | Li | 2, 1 | Li2O |
| Sodium | Na | 2, 8, 1 | Na2O |
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