Answer :
Final answer:
The valency of fluorine is 1, as it has seven electrons in its valence shell and needs to gain one more electron to fulfill the octet rule and achieve a stable configuration. This valency predicts that in chemical reactions, fluorine is likely to accept one additional electron from another element.
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Explanation:
The valency of an atom such as fluorine can be determined by examining the number of valence electrons in the outer shell. In the case of fluorine, its atomic number is nine, and it has seven electrons in its valence shell. To fulfil the octet rule and have a stable configuration, fluorine aims to achieve eight electrons in its valence shell.
Based on this requirement, fluorine is most likely to accept one additional electron from another element during chemical reactions, making the valency of fluorine 1. Hence, the answer from the given options to the question 'What is the valency of Florine?' is not 4, 7, 2 or 3, but rather, it's implicitly 1 since fluorine needs just one more electron to reach octet stability.
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