题干

短周期主族元素W、X、Y、Z的原子序数依次增加。A是元素Y的单质。常温下,甲的浓溶液和A发生钝化。丙、丁、戊是由这些元素组成的二元化合物,且丙是无色气体。上述物质的转化关系如图所示。下列说法正确的是 (   )

A:丁和戊中所含元素种类相同

B:简单离子半径大小:X<Y

C:气态氢化物的还原性:X>Z

D:Y的简单离子与Z的简单离子在水溶液中可大量共存

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A

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    Fort Scott High School English teacher Emily Rountree has been working this semester to raise money for Charity Water, a nonprofit organization that uses 100 percent public donations to help fund water projects in places without access to clean drinking water. Her goal was to motivate her students to use their writing in class to make a real-world difference. Twelve students got top grades for the project, and their articles will be published both in The Tribune and online. Here is one example:

    Did you know that there are many countries around the world that dont have access to safe drinking water? Just think: that could be you, or someone in your family. My name is Tanner Johnson, and I attend Fort Scott High School. In my English classes, we are trying to raise money for Charity Water. Charity Water is an organization that helps people get water in countries where there is no safe drinking water.

    In developing countries, 780 million people dont have access to clean drinking water. In Africa alone, people spend 40 billion hours every year just walking to get water. Women and children are the ones that mainly do the walking. They could be attacked or get hurt while they travel to get water. When they do get home, the water that they have brought is unsafe water from swamps, ponds, or rivers. If they had safe drinking water, they wouldnt have to worry about these problems, and they wouldnt be wasting hours of their day. Unsafe drinking water causes many different kinds of diseases that could lead to death.

    You could help save someones life, by donating $20 so we can help get them some safe drinking water. You can easily donate online at mycharitywater.org/fshsenglish, or you can send a check to Emily Rountree, payable to Fort Scott High School. If we dont help these people, then who will?