最硬&最軟的金屬(20點)
回答 (2)
2008-11-29 4:56 pm
最硬metal 是Lutetium鎦為稀有金屬.
最軟metal 是Cesium銫為銀白色, 須浸於石油. 與上述有分別,
請化學尊業指導!!!
最軟metal 是Cesium銫為銀白色, 須浸於石油. 與上述有分別,
請化學尊業指導!!!
2008-11-29 2:30 pm
鉻 最硬, 其次係 銠, 鈉, 同 汞.
鉻 chromium (Cr): Brinell hardness: 1120 MPa
銠 rhodium (Rh): Brinell hardness: 1100 MPa
鈉 sodium (Na): Brinell hardness: 0.69 MPa
汞 mercury (Hg) is liquid at room temperature and has a Birnell hardness of 0.
鉻 chromium (Cr): Brinell hardness: 1120 MPa
銠 rhodium (Rh): Brinell hardness: 1100 MPa
鈉 sodium (Na): Brinell hardness: 0.69 MPa
汞 mercury (Hg) is liquid at room temperature and has a Birnell hardness of 0.
參考: wikipedia + self
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