Fe2+ ⇌④① Fe3+ ⇌③② FeO42﹣(高铁酸根离子)
I.回答下列有关问题:
日本外务省次官粟山尚一在《动荡的90年代与日本外交的新展开》中写道:“当今世界20万亿美元的国民生产总值中,美欧各占5万亿美元,日本为3万亿美元……这也是共同分担国际责任的结构比例,要建立国际新秩序,就离不开5:5:3的合作”。这表明日本的企图是( )
C
My name is Mary. I am an English girl. I'm twelve. My dad and mom are English teachers. I have a brother. His name is Tom and he is thirteen years old. We are in China now. Tom and I are in Beijing No.4 Middle School. Tom is in Class 4, Grade 8 and I am in Class 9, Grade 7.I have a dog. It looks strong(强壮的).It has a big mouth and two black ears. We have many Chinese friends here. They are kind(和善的).
根据短文内容,判断正误。
如图中A、B、C、D是四种粒子的结构示意图.请回答下列问题:
(1)A中x=____ ;A粒子的化学式是____ .
(2)由B粒子的结构示意图可知,B粒子的名称是____ .
(3)以上四种结构示意图所表示的粒子中,表示离子的是____ (填字母代号).