化学专业外语练习题(共16页).doc

精选优质文档-倾情为你奉上1、c Which of the following belongs to phosphate?( sodium phosphite)(a) PH3 (b) Na3PO3 (c) Na3PO4 (d) P2、b 1H and 2H are _ and occupy the same position in periodic Table.(a) isomers (b) isotopes (c) redox bodies (d) amphoteric compounds3、d The _ of a carbon is 12 (a) the weight of molecule (b) molecular number (c) the weight of atom (d) atomic weight4、Which of the following belong to nitrate? C (a) NH3 (b)