Chemistry
Grade-9
Easy
Question
What is the true cause of the increased reactivity of halogens?
- Halogens have 1 valence electron that they give away readily to other elements in reactions.
- Halogens have seven valence electrons, and when all seven are transferred to other elements, a tremendous amount of energy is lost.
- Only one electron is required for halogens, which they can fiercely grab from other elements.
- Halogens only react violently with water.
Hint:
Halogens have one electron less than noble gases.
The correct answer is: Only one electron is required for halogens, which they can fiercely grab from other elements.
- Halogens are present in group 17.
- They have 7 electrons in their outermost shell, one electron less than noble gases.
- Halogens can easily grab one electron to attain most stable configuration. This makes them very reactive.
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