Mrs. Green lives in the country, and she doesn't know London very well. One day, she went to London. She couldn't find her1Just then, she2a man near the bus stop. " I can ask him the way." she says to3and asked, "Excuse me, will you please4me the way to King Street?" The man smiled with5answers. He 6know English. He spoke Russian. He was a 7Then he8his hand into his pocket,9a piece of paper and let her10it. On the paper are these words, "Sorry, I don't speak English."

在分子、原子、质子、中子、电子中，找出符合下列条件的粒子名称，填在相应的横线上．

（1）能直接构成纯净物的粒子是____．（2）能保持物质化学性质的粒子是____ ．

（3）化学变化中的最小粒子是____ ．（4）带正电荷的粒子是____ ．

（5）带负电荷的粒子是____．（6）不显电性的粒子是____ ．

（7）决定原子质量大小的粒子是____ （8）在同一原子中数目相等的粒子是____．