本课配套习题挑战模式2/4
单选题
难度系数:
2.
A、B元素的原子核外电子层排布如下图。A、B两元素形成的化合物的化学式是 。
A: B3A |
B: B2A |
C: BA |
D: BA2 |
一次做对,真牛!
+5奖励规则>
- 提示1:PHA+QeeahOi0qOWtkOaVsOS4ujE277yM5pivU+WOn+WtkO+8jELnmoTotKjlrZDmlbDkuLoxMe+8jOaYr05h5Y6f5a2Q44CCPGJyPjwvcD4=
- 提示2:PHA+T+WOn+WtkOS4ui0y5Lu377yMTmHljp/lrZDkuLorMeS7t+OAgjxicj48L3A+
- 答案:Qg==
PHA+QeeahOi0qOWtkOaVsOS4ujE277yM5pivU+WOn+WtkO+8jELnmoTotKjlrZDmlbDkuLoxMe+8jOaYr05h5Y6f5a2Q44CCPGJyPjwvcD48cD5P5Y6f5a2Q5Li6LTLku7fvvIxOYeWOn+WtkOS4uisx5Lu344CC5b6I5a655piT5b6X5Ye6562U5qGI44CCPGJyPjwvcD4=
本课配套习题挑战模式3/4
单选题
难度系数:
3.X、Y两种元素的原子,最外层电子数分别是2和7,则X和Y形成的化合物的化学式是
A: XY |
B: X2Y |
C: X2Y3 |
D: XY2 |
一次做对,真牛!
+5奖励规则>
- 提示1:IFjlhYPntKDmnIDlpJblsYLnlLXlrZDmlbDkuLoy77yM5YiZWOWFg+e0oOS4uisy5Lu344CC
- 提示2:IFnlhYPntKDmnIDlpJblsYLnlLXlrZDmlbDkuLo377yM5YiZWeWFg+e0oOS4ui0x5Lu344CC
- 答案:RA==
WOWFg+e0oOacgOWkluWxgueUteWtkOaVsOS4ujLvvIzliJlY5YWD57Sg5Li6KzLku7fjgIJZ5YWD57Sg5pyA5aSW5bGC55S15a2Q5pWw5Li6N++8jOWImVnlhYPntKDkuLotMeS7t+OAguWMluWQiOeJqeS4reWFg+e0oOWMluWQiOS7t+eahOS7o+aVsOWSjOS4uumbtu+8jOWImVhZPHN1Yj4yPC9zdWI+PHN1Yj7jgII8L3N1Yj4=
本课配套习题挑战模式4/4
单选题
难度系数:
4.A和B两种原子的电子层数都是3层,已知A原子的最外层电子数是1,B原子的最外层电子数是6,则A和B形成的化合物的化学式是
A: AB |
B: A2B |
C: AB2 |
D: A2B3 |
一次做对,真牛!
+5奖励规则>
- 提示1:IEHljp/lrZDmnInkuInlsYLnlLXlrZDlsYLvvIzmnIDlpJblsYLnlLXlrZDmlbDkuLox77yM5YiZQeWFg+e0oOeahOeUteWtkOWxgueUseWGheWIsOWkluWIhuWIq+S4uu+8mjIgOCAx77yM5Y+v5Lul5o6o5rWL5Ye6QeWOn+WtkOOAgg==
- 提示2:IELljp/lrZDmnInkuInlsYLnlLXlrZDlsYLvvIzmnIDlpJblsYLnlLXlrZDmlbDkuLo277yM5YiZQuWFg+e0oOeahOeUteWtkOWxgueUseWGheWIsOWkluWIhuWIq+S4uu+8mjIgOCA277yM5Y+v5Lul5o6o5rWL5Ye6QuWOn+WtkOOAgg==
- 提示3:IEHljp/lrZDkuLpOYe+8jOS4uisx5Lu344CCQuWOn+WtkOS4ulPvvIzkuLotMuS7t+OAgg==
- 答案:Qg==
QeWOn+WtkOacieS4ieWxgueUteWtkOWxgu+8jOacgOWkluWxgueUteWtkOaVsOS4ujHvvIzliJlB5YWD57Sg55qE55S15a2Q5bGC55Sx5YaF5Yiw5aSW5YiG5Yir5Li677yaMiA4IDHvvIzlj6/ku6XmjqjmtYvlh7pB5Y6f5a2Q5Li6TmHjgIJC5Y6f5a2Q5pyJ5LiJ5bGC55S15a2Q5bGC77yM5pyA5aSW5bGC55S15a2Q5pWw5Li6Nu+8jOWImULlhYPntKDnmoTnlLXlrZDlsYLnlLHlhoXliLDlpJbliIbliKvkuLrvvJoyOCA277yM5Y+v5Lul5o6o5rWL5Ye6QuWOn+WtkOS4ulPjgIJOYeS4uisx5Lu377yMU+S4uisy5Lu377yM5YiZQULlvaLmiJDnmoTljJblkIjniankuLpOYTxzdWI+Mjwvc3ViPlPjgII=