Question

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✎ What are the Similarities in Properties of Element in Halogen Family?



✎ Why Does Inert Gases Placed in Zero Group?


Class:- 10th

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Answer 1

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Question :

• ✎ What are the Similarities in Properties of Element in Halogen Family?

Answer :

• "All in this group are characterized by the presence of 7 e- in an outer shell, and hence have the ability to gain an e- to form negative ions w/ a completed octet of valence e-’s.
• All these elements share traits of being very reactive and in particular form substitution compounds w/ numerous organic compounds.
• Although these elements also have other valences all have a -1 valence in common."

Question :

• ✎ Why Does Inert Gases Placed in Zero Group?

Answer :

• because their outermost orbit is complete. in mendeleevs original periodic table there was no place reserved for noble gas. they was discovered in end of 19th century. so mendeleev created zero group without disturbing original periodic table.

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Answer 2

✏Halogens share many similar properties including: They all form acids when combined with hydrogen. They are all fairly toxic. They readily combine with metals to form salts.

✏Inert gases have their completely filled valence shell with octet of electrons. So they have 0 valency and thus non reactive in nature thus placed in Zero Group