如何分辦鈉和銀(急急急!!!!!!!)

1) By observation
sodium will have a dull surface while silver has a shinny surface
sodium react with oxygen in air to form an oxide layer on the surface

2) By hardness
sodium metal is soft and can be cut using knife easily while silver cant

3) Put in in water
Sodium will react vigorously with water with a yellow flame and float on the water surface while silver sinks and have no observable change

小心用鑷子將小粒的鈉和銀分別放入水中。鈉與水有劇烈反應，而銀與水則無反應。

用冷热水就可以了,顏色不同便知道了。

相信銀要用鋸，鋸開，上次貪得意鋸開一個五文銀挽下。