Figure number (ii) is correct because sodium ion (Na+ ) is formed when one electron is lost.
Na → Na+ + le −
(2,8,1) (2,8)
The valency of sodium atom is one because stable (octet) electronic configuration is obtained after loss of one electron.
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Question
Identify the Na+ ion from the following figures. What is the valency of sodium atom? Give reason.(/br)
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💡 Some Related Questions
Complete the following gaps in the given table:
| Elements | Protons | Electrons | Neutrons | Atomic Number | Mass Number |
| A | – | – | 10 | 8 | – |
| B | 15 | – | – | – | 31 |
| C | 1 | – | – | – | 3 |
| D | – | 11 | 12 | – | – |
Composition of the nuclei of two atomic species ‘X’ and ‘Y’ are given below:
| X | Y | |
| Protons | 8 | 8 |
| Neutrons | 8 | 10 |
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