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  1. The melting point of a crystalline solid is the temperature range at which it changes...such in most textbooks and literature, most crystalline compounds actually melt over a range of a few degrees or less. At the melting point...

  2. D is correct since ionic compound(giant) has high melting ,eg. 900. since they are held by strong electrostatic force, so a large amount...

    分類:科學及數學 > 化學 2010年03月19日

  3. the melting point of a substance is related to its structure. when the force... needed to convert them from solid state to liquid state. so the melting point is low. on the contrary, when the force between particles ...

    分類:科學及數學 > 化學 2008年03月14日

  4. Nitrogen: Melting point 63.15 K (-210.00 °C, -346.00 °F) Boiling point 77...: it depends.. Pure silica (SiO2) has a melting point of about 2,000° C (3,632° F). Others varied and...

    分類:科學及數學 > 化學 2007年09月16日

  5. 1) In the temperature of melting point or freezing point of a substance, the solid and... freezing point. Hence the melting point and the freezing point are the same.

    分類:科學及數學 > 化學 2007年06月06日

  6. ... thus much lower than that of a low rating fuse. The melting point of the fuse material is not an influential factor. 2. They could be...

  7. The melting point of any substance would be lowered if it contains impurity. ..., the lattice would be broken at a temperature lower the normal melting point of the pure substance. In other words, the melting point of...

    分類:科學及數學 > 化學 2007年10月02日

  8. ...but NaF is ionic which does not contain any molecule. The melting point of NaF is high. NaF has giant ionic structure, and...

    分類:科學及數學 > 化學 2009年02月13日

  9. ... that high molecular symmetry is associated with high melting point. The symmetry of a molecule can be described by 5 types...

    分類:科學及數學 > 化學 2010年02月23日

  10. 如果個subtance既 melting point係-10℃ 咁姐係個substance會係-10℃個陣變solid 而boiling...係123℃個陣變gas 所以room temperature個陣應該會係liquid. Since the melting point of the substance is -10℃, it means the substance will become...

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