论文部分内容阅读
原子量:H～IC～12 N～14 O～16 Na。-23 9下列各组化合物中,凡同种元素均显示相同化 S～32 Ca—40 合价的是() 一、选择题(每题只有一个正确答案)(A)ZnK).和 ZnS(卜爪CI()3和 KCI l.下列变化中,属于物理变化的是().＊爪MnO.和K。MnO ()以k和tiCh)3 (川用铁矿石冶炼生铁10下列反
Atomic weight: H ~ IC ~ 12 N ~ 14 O ~ 16 Na. -23 9 Among the following groups of compounds, where the same elements all show the same S-32 Ca- 40 equivalence, () a multiple-choice question (only one correct answer for each question) (A) ZnK) and ZnS ( Claw CI () 3 and KCI l. The following changes, which are physical changes are (). * Claw MnO. and K. MnO () with k and tiCh) 3 (Chuan with iron ore smelting pig iron 10 following anti-