Chemistry
chase0321
2016-04-26 11:53:57
Which of these alkalis has the most stable fluoride? a) Sodium b) Lithium c) Rubidium d) Potassium
ANSWERS
KarlVereb
2016-04-26 16:02:08

The correct option is B. The alkali metals combine directly with halogens forming high melting point crystalline solids that have high negative enthalpies of formation. The entalphy of formation for lithium bromide is the highest and the values decrease down the group, thus, lithium is the most stable while cesium is the least stable. 

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