题目:下图中的大小、颜色不同的小球,分别表示不同质子数的原子(1)上述变化中的最小粒子是(填分子或原子);图中所示物质中属于单质的是;属于混合物的是;用符号表示图片B中所有的粒子。(2)反应前后的化学计量数之比是;该反应的类型属于;请例举初中化学中符合此过程的化学变化(用 Title: Small balls of different size and color in the figure below represent atoms with different numbers of protons. (1) The smallest particles in the above changes are (filling molecules or atoms); the substances in the figure are monomorphic; The mixture is; use the symbol to represent all the particles in picture B. (2) The ratio of the stoichiometric number before and after the reaction is; the type of the reaction belongs; Please cite the chemical changes that correspond to this process in junior high school chemistry (