The decomposition temperature of the Group 2 carbonates:
A) increases down the group.
B) decreases down the group
C) shows no group trends.

Question

Quizplus · Accepted Answer

The decomposition temperature of Group 2 carbonates increases down the group. This is because the cations become larger and their charge density decreases, making it harder to polarize the carbonate ion and thus requiring more energy (higher temperature) to decompose the carbonate.

The Decomposition Temperature of the Group 2 Carbonates