why do ionic compounds tend to be hard

why do ionic compounds tend to be hard explain why ionic compounds do not conduct electricity in their crystalline form ionic compounds是什么意思 从离子键角度解释为什么离子化合物成晶体且坚硬易碎~原题：In general,Ionic compounds are hard solids at ambient temperatures but they shatter fairly easily.How do these two properties support the theory of ionic bonding? why not do it why do people lie? why do you drink Why do not want why do i fa11love why do i sigh why not do句子 why do you ask why do you give why not do还是why not to do Why not do 和 Why don't do 什么区别 Why do you do not understand why My heart ache why not do同义句是啥?why not do同义句 why do people have pets?