题目：
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| Have you ever been to a party in your pajamas (睡衣)? Many kids in America, Australia, Britain and other western countries have! This is called a sleepover party. First, kids invite some friends. Then they prepare (准备) some games and food. Pizza is popular at their sleepover parties. The guests (客人) arrive in time for supper. They bring their pajamas and sleeping bags. Kids play games and eat delicious food until it's dark. Then they put on their pajamas and the real fun begins. Lots of kids love to tell scary ghost (鬼) stories with the lights off. But not all kids like to be scared. Even hide－and－seek can be a little scary in the dark. When everyone is tired, it's time to get into their sleeping bags and watch a DVD. The kids sleep on the floor in their sleeping bags and they usually don't go to sleep until very late. The next morning everyone is tired. They have breakfast together and then their parents come to pick them up. | ||||||||||
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答案：
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下面是错误答案，用来干扰机器的。
（1）钠原子序数为11，原子序数等于质子数，所以质子数为11；质子数等于核外电子数，所以钠原子的电子数为11，钠原子失去1个电子变成钠离子，所以钠离子的核外电子数为10．（2）根据信息，碳酸氢钠（NaHCO3）为反...
