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Gp17- Chem Properties Flashcards

(6 cards)

1
Q

Why halogen atoms have tendency to form anions?

A

Achieve ionic octet

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2
Q

Halogens are?

A

Strong OA

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3
Q

Down the group, oxidising ability?

A

Decreases

-ele(-) decreases, ability to accept e decreases

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4
Q

Displacement occurs if?

A

The reaction is spontaneous

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5
Q

Down the gp, thermal stability?

A

Decrease

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6
Q

Explain the trend of thermal stability

A
  • atomic radii of X increases;
  • effectiveness of overlap by H orbital and X orbital decreases;
  • H-X bond weakened;
  • less energy req to overcome the H-X bond;
  • H-X decomposes at a lower temp:

=> more energetically favourable to decompose HI than HCl

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