(a) If ‘X’ contains 6 electrons in ‘M’ shell as valence electrons, then the electronic configuration of ‘X’ is K = 2, L = 8, M = 6
∴ Atomic number = 16
(b) ‘X’ is a non-metal.
Question
An element ‘X’ contains 6 electrons in ‘M’ shell as valence electrons: (a) What is the atomic number of ‘X’? (b) Identify whether ‘X’ is a metal or non-metal.
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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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