初三科学：上册第三章活动2钠与氧气反应 (pg45)
Quiz by CHEW HOCK LEONG周福隆
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8 questions
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- Q1实验影片中，新鲜的钠（刚切开表面）是什么颜色的？绿色黑色银白色红色Video30s
- Q2实验影片中，新鲜的钠（刚切开表面）是否光亮？否是30s
- Q3实验影片中，新鲜的钠（刚切开表面）是否很快失去光泽变得灰暗？否是30s
- Q4以上表面，钠是不是容易在空气里发生变化？否是30s
- Q5实验影片中，钠在空气中燃烧发出什么颜色的火焰？紫色黄色蓝色绿色Video30s
- Q6实验影片中，钾在空气中燃烧，发出什么颜色的火焰？蓝色白色黄色紫色Video30s
- Q7以上两个影片显示，钠和钾何者较容易在空气中燃烧且较为剧烈？钠钾30s
- Q8以上两个影片显示，非常活泼的金属例如钠和钾等，应该怎么储藏？储藏在活泼气体中储藏在水里储藏在煤油里不需特别储藏方式，曝露在空气中即可30s