Group 2 nitrates break down when heated. Write an equation for the decomposition of strontium nitrate.
Describe and explain how the thermal stability of Group 2 nitrates varies as the atomic number increases down the group.
The pattern in the thermal stability of Group 2 amides is similar to that of Group 2 nitrates. Suggest whether calcium amide, $\text{Ca(NH}_2)_2$, will decompose more or less readily than barium amide, $\text{Ba(NH}_2)_2$. Explain your answer.
$\text{Ba(NH}_2)_2$ decomposes on heating to produce barium nitride, $\text{Ba}_3\text{N}_2$, and ammonia as the only products. Write an equation for this reaction.
$\text{Ba(NH}_2)_2$ contains the $\text{NH}_2^-$ ion. Predict the bond angle of $\text{NH}_2^-$. Explain your answer using the qualitative model of electron-pair repulsion. bond angle; explanation.