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vlada-n [284]
3 years ago
14

Which atom in the ground state has a stable valence electron configuration?

Chemistry
2 answers:
Alecsey [184]3 years ago
3 0
(1) Ar is your answer. Argon is a noble gas, which is stable in its standard valence electron configuration because it already completed its valence shell following the octet rule.
Advocard [28]3 years ago
3 0

Answer: (1) Ar

Explanation: Argon is an element with atomic number of 18. Thus it contains 18 electrons. It's electronic configuration in ground state is:

1s^22s^22p^63s^23p^6

As argon contains completely filled orbitals, it is stable and is a inert element.

Aluminium is an element with atomic number of 13. Thus it contains 13 electrons. It's electronic configuration in ground state is: 1s^22s^22p^63s^23p^1

Silicon is an element with atomic number of 14. Thus it contains 14 electrons. It's electronic configuration in ground state is: 1s^22s^22p^63s^23p^2

Sodium is an element with atomic number of 11. Thus it contains 11 electrons. It's electronic configuration in ground state is: 1s^22s^22p^63s^1






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