Gp17- Chem Properties Flashcards
(6 cards)
Why halogen atoms have tendency to form anions?
Achieve ionic octet
Halogens are?
Strong OA
Down the group, oxidising ability?
Decreases
-ele(-) decreases, ability to accept e decreases
Displacement occurs if?
The reaction is spontaneous
Down the gp, thermal stability?
Decrease
Explain the trend of thermal stability
- 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