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anonymous

  • one year ago

Let's go over the fundamental structures of an atom together!

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  1. anonymous
    • one year ago
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    yay

  2. anonymous
    • one year ago
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    Thanks

  3. anonymous
    • one year ago
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    To begin with protons and neutrons as well as electrons are our homies. We all know them right?

  4. anonymous
    • one year ago
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    But how they actually play around with the naming systems like the atomic mass and atomic number and such... Worth going over them.

  5. anonymous
    • one year ago
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    More over things like orbitals and energy levels and the fact that each energy level contains different number of orbitals....XD

  6. anonymous
    • one year ago
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    So the textbook says our atomic mass is equal to how many protons and electrons are present in the nucleus, and this helps us identify the orbiting electrons as a result.

  7. anonymous
    • one year ago
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    However even more fascinating is the notations they use

  8. anonymous
    • one year ago
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    I am reading the isotopes section right now. The number of neutrons present alone can affect the entire structure of an atom. How fancy and cool

  9. anonymous
    • one year ago
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    that's awesome

  10. anonymous
    • one year ago
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    Ye

  11. anonymous
    • one year ago
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    Did you know the most outer orbital is named as valence shell? That sounds so bad use

  12. anonymous
    • one year ago
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    *uss

  13. anonymous
    • one year ago
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    Discovery of knowledge is beautiful

  14. anonymous
    • one year ago
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    And obviously electrons situated in the most outer orbital are called valence electrons

  15. anonymous
    • one year ago
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    Oh by the way I just figured aluminum has 3 electrons in the valence shell and according to the diagram system called electron shell diagram Aluminum is considered extremely reactive with other elements because it has 3 electrons which are not fully conformed with 8 electrons usually in each orbital.

  16. anonymous
    • one year ago
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    Hey Ganashie Join us too

  17. anonymous
    • one year ago
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    We are having recap session of our high school university introductory chem

  18. anonymous
    • one year ago
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    @ganeshie8

  19. ganeshie8
    • one year ago
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    Please continue... I'm just not good wid these haha!

  20. anonymous
    • one year ago
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    Ok. Now we are comparing Lewis Dot diagram and electron shell diagram!

  21. anonymous
    • one year ago
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    Can anyone tell the difference between them?

  22. anonymous
    • one year ago
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    It's actually so cute

  23. anonymous
    • one year ago
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    Yup

  24. ganeshie8
    • one year ago
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    I think dot diagram only tells about the valence shell

  25. anonymous
    • one year ago
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    Yeah! You are right on the spot give yourself a medal Ganashie!

  26. anonymous
    • one year ago
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    So this goofy guy Lewis came up with a convenient method of identifying an element by just looking at the number of valence electrons situated in the valence orbit

  27. anonymous
    • one year ago
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    How convenient! Whereas electron shell diagram shows all the electrons from inside out so that's like running your fingers from your mouth to rectum

  28. ganeshie8
    • one year ago
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    We only care about valence electrons in chemical reactions is it

  29. anonymous
    • one year ago
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    Yeah

  30. anonymous
    • one year ago
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    It's fascinating how they disregard other orbitals except for valence orbit because that mostly determines the reactivity of an element. Take ammonia for example

  31. anonymous
    • one year ago
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    Also depends on the type of bonding in a compound which goes a long list but on just atomic scale valence electrons are only reponsibles for reaction

  32. freckles
    • one year ago
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    Hey! I think I remember something about each "ring" of the atom can only allow a certain amount of electrons right? What was that pattern of numbers for allowance? Or is this not true?

  33. anonymous
    • one year ago
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    Take water for example. Notice how water doesn't just spill out of the cup when it's full but it goes like 1-2mm higher than the cup

  34. anonymous
    • one year ago
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    @freckles Yes you are right

  35. anonymous
    • one year ago
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    They are called energy levels or electron configurations

  36. ganeshie8
    • one year ago
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    I think it has to do with afbou principle

  37. anonymous
    • one year ago
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    Actually water's compound is V shaped and has dipole dipole attractions

  38. anonymous
    • one year ago
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    So they tend to stick with each other.

  39. ganeshie8
    • one year ago
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    I remember water is a polar molecule idk if it is a molecule or compound anymore lol

  40. freckles
    • one year ago
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    I don't know about the polar part. But water is a molecule.. I don't know what a compound is.

  41. anonymous
    • one year ago
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    I think it is both

  42. anonymous
    • one year ago
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    compound-substance composed of two or more elements

  43. anonymous
    • one year ago
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    but I think molecule holds true too

  44. freckles
    • one year ago
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    so is dioxide a compound since there are two elements...or do the elements have to be distinct.

  45. anonymous
    • one year ago
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    molecule doesn't necessitate the presence of more than 2 different elements

  46. ganeshie8
    • one year ago
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    so H2 is a molecule but not a compound because it is made up of pure H atoms is it

  47. anonymous
    • one year ago
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    You're very enthusiastic Robert, and that's good! Keep up your work

  48. anonymous
    • one year ago
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    Yeah it appears so

  49. anonymous
    • one year ago
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    We call them oxygen molecules but not oxygen compounds

  50. anonymous
    • one year ago
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    A compound is any collection of atoms or molecules, which are CHEMICALLY combined in a fixed ratio by mass

  51. anonymous
    • one year ago
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    compounds implies "mixture" "combination"

  52. anonymous
    • one year ago
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    a bit off topic but you guys might enjoy https://www.youtube.com/watch?v=Hb8P9N4KGm8 or https://www.youtube.com/watch?v=eqtuNXWT0mo

  53. anonymous
    • one year ago
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    @Nishant_Garg you said compounds are in "set ratio". Whereas molecules are also set ratio aren't they

  54. anonymous
    • one year ago
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    Or the means by which these elements bond-like ionic bonding (due to force of attraction from positively charged or negatively charged atoms) or covalent bonding(sharing of electrons from valence orbital)

  55. anonymous
    • one year ago
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    Example of this is sodium. Notice the name sodium chloride. Sodium ions attracted to negatively charged chloride ions.

  56. anonymous
    • one year ago
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    Recap:ions are either positively charged or negatively charged atoms.

  57. ganeshie8
    • one year ago
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    Intuitively, it seems that ionic bonding cannot happen in a molecule because neither wins/loses as both atoms are same

  58. anonymous
    • one year ago
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    They seem to compensate with each other via double boding.

  59. anonymous
    • one year ago
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    Oh never forget there is also triple bonding too.

  60. anonymous
    • one year ago
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    With the exception of hydrogen bonding

  61. anonymous
    • one year ago
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    A molecule is the smallest unit of a compound, just like how atom is to element For example a very big compound maybe made of just 1 type of molecule repeated several times (this happens in organic chemistry) So H2 can infact be considered a compound, it's chemically bonded, it's ratio by mass is 1:1 between both hydrogen atoms

  62. anonymous
    • one year ago
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    however people usually talk of H2 as H2 molecules

  63. anonymous
    • one year ago
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    i never actually found out what an atom looks like, would you go over some models that quantum mechanics provides ?

  64. ganeshie8
    • one year ago
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    I know Si, in its pure form, forms a crystal structure sharing one electron(covalent bonding) with each of its four surrounding Si atoms so that the valence shell contains 8 electrons which happens to be the stable configuration that mother nature likes

  65. anonymous
    • one year ago
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    Yeah especially when it comes to carbon chain bonding in organic chemistry it becomes tediously long.

  66. anonymous
    • one year ago
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    Oh by the way there is also "chain" as well just like there is compound and molecule.

  67. ganeshie8
    • one year ago
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    A compound is a molecule that contains at least two different elements. All compounds are molecules but not all molecules are compounds. Molecular hydrogen (H2), molecular oxygen (O2) and molecular nitrogen (N2) are not compounds because each is composed of a single element. @Nishant_Garg google gives that

  68. anonymous
    • one year ago
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    Hmm true, because it's the same atom

  69. ganeshie8
    • one year ago
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    Based on that definition, we cannot say H2, N2 etc are compounds...

  70. anonymous
    • one year ago
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    Yeah like I said compound implies mixture to my ear does it to yours?

  71. anonymous
    • one year ago
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    Yep it must be different atoms now that I remember for a compound

  72. anonymous
    • one year ago
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    whereas molecule has a tone of "moles" which is important in stoichiometry

  73. anonymous
    • one year ago
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    However covalent bonding may differentiate the subtle structure of molecules from ionic bonding...

  74. anonymous
    • one year ago
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    For most molecules I know are bonded with covalent bonding

  75. anonymous
    • one year ago
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    mixture is just a mix of different atoms in no definite proportion and not chemically combined, it's quite different from a compound I think

  76. anonymous
    • one year ago
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    However compounds..... yeah ionic bonding with cation and anion being attracted to each other

  77. ganeshie8
    • one year ago
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    yeah mixture is more like physical term..

  78. anonymous
    • one year ago
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    yeah but I meant the etymology of compound

  79. anonymous
    • one year ago
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    Electronegativity?

  80. anonymous
    • one year ago
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    and convalent bonding

  81. anonymous
    • one year ago
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    water is polar covalent bond

  82. anonymous
    • one year ago
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    denoted by asymmetrical structure.

  83. anonymous
    • one year ago
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    Whereas methane is not. Because the compound appears symmetrical.

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