IB Physics: The Atom

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  • Опубликовано: 23 янв 2025

Комментарии • 36

  • @adhamabusalah9605
    @adhamabusalah9605 6 лет назад +25

    These videos are great, idk how to thank you, like these videos are free and sooooo effective compared to other websites or channels that need money such as studynova. thank you so much for such videos and I wish if you can solve some high level past paper questions and make videos about it.

    • @romanempire3764
      @romanempire3764 5 лет назад

      Hey ! U done with ib?

    • @donerphysics
      @donerphysics  5 лет назад +7

      @@romanempire3764 No, not at all. I took a break from making videos over the summer.

    • @romanempire3764
      @romanempire3764 5 лет назад

      @@donerphysics i meant to ask him @adham...

  • @felisc0071
    @felisc0071 7 лет назад +82

    U are my new God. Lord and saviour. Im creating a religion called Donerism

    • @sopidwoop8067
      @sopidwoop8067 3 года назад +2

      bill wurtz: "we could make a religion outta this"

  • @Vanilla2903
    @Vanilla2903 5 лет назад +16

    Mocks are tomorrow, wish I could have found these videos earlier...

  • @ramikheiralla572
    @ramikheiralla572 4 года назад +14

    Reeeeally regret not choosing SL Bio right now :(

  • @averystrangeguy4378
    @averystrangeguy4378 7 лет назад +4

    In your explanation of the Geiger-Marsden experiment, you said that the alpha particle is deflected when it is close to the nucleus because the positive charge on both causes repulsion, however you said "the electrons are too light to stop it". Why does the negative charge of the electrons not cause a significant force of attraction?

    • @donerphysics
      @donerphysics  7 лет назад +8

      Gold nucleus is 200000X as massive, with 79X the charge, whereas the electron is whirling around at 100000 m/s, and is effectively a blurr of charge spread out over a large area from the alpha particle's perspective.

  • @coolkid9206
    @coolkid9206 2 года назад

    At 5:52 shouldn't it be 13.6 + 3.4 electron volts?

    • @donerphysics
      @donerphysics  2 года назад

      You have to rise from -13.6 eV to -3.4eV, so you need to add 10.2 eV to get to the next level.

    • @coolkid9206
      @coolkid9206 2 года назад

      @@donerphysics Ok thanks. Also what does quantization mean?

    • @donerphysics
      @donerphysics  2 года назад +1

      It means when there are only discrete values. Humans are quantized. We can have one, two etc. but we never get 0.23 humans.

    • @coolkid9206
      @coolkid9206 2 года назад

      @@donerphysics GOAT explanation. Thank you.

  • @King_Bear
    @King_Bear 6 лет назад

    At 22:27 you mentioned that they have the same chemical and physical properties, would the existence of an extra neutron not mean a mass change, and hence different physical property?

    • @donerphysics
      @donerphysics  6 лет назад +1

      Good of you to notice. Just the chemical properties are the same.

  • @juanaekmek8256
    @juanaekmek8256 2 года назад

    is the ionization energy of hydrogen the same as the ground state but opposite because hydrogen has only 1 energy level or because it is a general rule?

    • @donerphysics
      @donerphysics  2 года назад

      Normally, an electron will be in the ground state. The ground state is a negative energy since the electron is trapped in the atom. To set the electron free, we must supply energy, and we must supply just enough to overcome the energy trap.

    • @juanaekmek8256
      @juanaekmek8256 2 года назад

      @@donerphysics thank you sm, you have been eternally responding to me this last few days and its so helpful thank you

  • @ac7plays152
    @ac7plays152 4 года назад

    Sir, in order to excite the H atom from ground state to n=2 or 3, we just subtract 13.6 and the energy of the respective n. However, if we supply 13.6 eV then does the attraction between electron and proton equals to zero and the ions form?

    • @donerphysics
      @donerphysics  4 года назад +1

      If we add 13.6 eV to the hydrogen atom, the electron can be set free from the proton (just barely) so that ions form. It is not that the attraction is zero. There is still attraction but the electron will have enough speed (kinetic energy) that it will never return to the proton.

  • @canberkozsu4013
    @canberkozsu4013 4 года назад

    Why the ionization energy is written as positive shouldn't it be -13.6 eV ? (I am referring to the second 13.6 the first one already has it.)

    • @donerphysics
      @donerphysics  4 года назад

      I am unsure of the context but often it is conventional to simply write the magnitude of a number for simplicity.

  • @dylanjeger4035
    @dylanjeger4035 5 лет назад

    Incredible video. Thanks!!

  • @sad_mo1
    @sad_mo1 6 лет назад

    Doesnt the potential energy follow the inverse square law?

    • @donerphysics
      @donerphysics  6 лет назад +1

      The force falls off as an inverse square, but the potential energy falls as 1/r.

  • @ibsat6156
    @ibsat6156 2 года назад

    If we give it exactly the same energy as the level it is in it gets ionised
    If we give it the difference between 2 energy levels it temporarily,moves to that energy level
    But what happens if we give it more energy than its level but not quite enough for it to reach the next stage

    • @donerphysics
      @donerphysics  2 года назад

      The atom will only absorb photons with energies that match energy gaps within the atom.

    • @ibsat6156
      @ibsat6156 2 года назад

      @@donerphysics Thank you very much!

  • @awaited2k537
    @awaited2k537 8 лет назад +15

    I love you

  • @betulgul5297
    @betulgul5297 4 года назад

    Thank you so much.

  • @mehreenm5285
    @mehreenm5285 4 года назад +5

    The nucleus is dense dense, tiny tiny. That's kinda cute.

    • @donerphysics
      @donerphysics  4 года назад +1

      Thank you. Please spread the word about the channel, become a subscriber or a member.

  • @rosahu8826
    @rosahu8826 3 года назад

    21:25 clearly 65 electrons 😂