Physics

posted by .

If energy is 1/2 mv^2; and m and v are always positive....

How come the ground state energy of Hydrogen is a minus value?

Charlie

  • Physics -

    The ground state energy of hydrogen is a sum of kinetic and potential energies. The potential energy is DEFINED to be zero when the electron and proton are infinitely far apart. As the electron gets closer, the attractive force between electron and proton makes the potential energy increasingly negative. The absolue value of the negative potential energy exceeds value of the kinetic energy (which is always positive), so the sum of the two energies is always negative.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    The energy of the nth excited state of a hydrogen atom is proportional to 100 - (100/n2). 1) Using this formula, calculate the energy of the first five energy states. 2) How many spectral lines are possible for the transition of a …
  2. chem

    How much energy is required to ionize a hydrogen atom in its ground (or lowest energy) state?
  3. physics

    You are shining ultraviolet light on a gas of an unknown element. You know that an electron starts in a ground state with an energy of -19.10 eV. The electron absorbs a 4.00-eV photon. The electron immediately drops to an intermediate …
  4. Physics

    A hydrogen atom initially in its ground state (n = 1) absorbs a photon and ends up in the state for which n = 3. What is the energy of the absorbed photon?
  5. physics

    The higher the energy level occupied by an electron in the hydrogen atom, the larger the atom. The diameter of the atom is proportional to n2, where n = 1 labels the lowest, or "ground" state, n = 2 is the second state, n = 3 is the …
  6. Physics

    A hydrogen atom is in its third excited state (n=4). Using Bohr theory of the atom calculate (a) the radius of the orbit, (b) the linear momentum of the electron, (c) the angular momentum of the electron (d) the kinetic energy (e) …
  7. chemistry

    Consider an electron in the ground state of hydrogen. (a)What is the least amount of energy needed to excite the ground state electron in Joules?
  8. physics

    For a hydrogen atom, determine the ratio of the ionization energy for the n = 3 excited state to the ionization energy for the ground state.
  9. physics

    A singly ionized helium atom is in the ground state. It absorbs energy and makes a transition to the n = 3 excited state. The ion returns to the ground state by emitting two photons. What are their wavelengths of a lower and higher …
  10. Physics

    A hydrogen atom is in the ground state. It absorbs energy and makes a transition to the n = 5 excited state. The atom returns to the ground state by emitting two photons, one in dropping to n = 4 state, and one in further dropping …

More Similar Questions