science

  1. F

    Is it known to science why electron energy levels change, as atoms become molecules,

    Is it known to science why electron energy levels change, as atoms become molecules, or why electron voltage requirement changes when the electron is from the nucleus in higher shell levels. So can it just he observed that electrons need a certain electron voltage to move to higher shell...
  2. P

    Help with ASSIGNMENT!!!

    The periodic table of the elements contains many trends. During this lab, you will locate data on the Internet and prepare a data table and graph in order to explain some of these trends. PROCEDURE: Use the Internet to locate data for the atomic radius for elements 1-56. Using graphing...
  3. W

    forensic science student

    Which of the following funtional groups (amine/alcohol/aromatic/ether/carboxylic acid) do the five amphetamine drugs have (amphetamine/metamphetamine/mda/mdma/mdea)??????
  4. E

    Chemistry site

    I'd like to have your opinion about a science site: http://www.physics-chemistry-class.com This is a translation and an adaptation from my french site. My english is far from being perfect and your opinion and critics ( don't be too severe ! :p ) would be very helpful. I want to publish more...
  5. S

    Colloid Science

    Hi, can someone help me to give link or suitable books or notes about colloid. I also looking for list of formula that is used in colloid. here is my question: Some 0.14mg stearic acid of long chain molecule (molecular mass 284) has been dispersed on the water surface. If the cross section...