Why is the melting point of an element lower than its boiling point? Why do ionic compounds have high melting points? Explain why the melting point and boiling point of alkali metals are low. Why does MgO have a
Why does the periodic table work? Why do ironic compounds have high melting points? How many covalent bonds are normally formed by C? How many covalent bonds are normally formed by F? Insulators also contain electrons, but they are not conductors, Why? Explain why the chemical activity of ti...
Dr. Hans Nieper, working in Germany, is considered by some to be one of the world's great innovative medical geniuses. He inventedCalciumEAP, which is also aneurotransmitterwhich may have something to do with its effectiveness in treatingMS. ...
Discovered by Johannes Diederik van der Waals, these forces are known to have lower melting points and high dependence to distance between molecules. Answer and Explanation: In the periodic table, Fluorine is located on top of Ch...
+ My Mom has pretty healthy teeth, but she does say that she notices that they are whiter. +Katie, my best friend, says she noticed her teeth have gotten whiter she find the process relaxing so it doesn’t bother her to do it. ...
Why does MgO have a higher melting point than CaS? Why do ionic compounds have high melting points? Explain why sodium chloride and cesium chloride have a much higher enthalpy of hydration compared to magnesium chloride. Explain why the melt...
Why Boiling point of water is more than hydrogen fluoride(HF)? Discuss the separation technique distillation. Why does I_2 have a higher boiling point than F_2? Describe the observations that one would make during the simple distillation of an "impure" substanc...
Why does urea have a sharp melting point but glass does not? What is the difference between an open or closed distillation system? Explain why the 1-bromobutane must be dried with anhydrous calcium before purifying it by fractional distillation. ...
Does cesium or aluminum have higher first ionization energy? Explain. Which compound would you expect to have the highest melting point? (a) BeO. (b) MgO. (c) CaO. (d) SrO. Which of the following has the highest electronegativity: P, S, or Cl? Ex...
A substance has a low melting point. It does not conduct electricity either when melted or as a solid. It is most likely: A. Diamond (C) B. Copper (Cu) C. Sodium (Na) D. Hydrogen sulfide (H_2S) The method used to separate iron filings from sand is [{Blank}...