An electron has the same amount of energy in all orbitals this is not true because depending on how much enegry it has will depend on how many orbitals it has.
An electron has the same amount of energy in all orbitals.
The problem of the electrons location in the atom is not valid now; the quantum theory proposed a more complicate system.
Bohr's model required electrons to orbit the nucleus in well-defined orbits in a manner similar to that of planets orbiting the sun.
true
It is true that an atom has a nucleus. As for which model of the atom is thought to be true, at the present time we use a model based upon quantum mechanics which differs significantly from the early Rutherford or Bohr atomic models.
Yes, it is true.
Niels Bohr in fact based his model on the hydrogen atom. However, I wouldn't say that the Bohr Model can be correctly applied to ANY atom. Whilst it is an excellent approximation it is not truly accurate. Please don't forget that the Bohr Model is just that, a model, and a model is never as accurate as the real thing.
D.) Electrons exist in energy levels
Yes, it is.
In the context of the plasma state of matter? Perhaps. I don't know.
true
It is true that an atom has a nucleus. As for which model of the atom is thought to be true, at the present time we use a model based upon quantum mechanics which differs significantly from the early Rutherford or Bohr atomic models.
Yes, it is true.
that they are very dense
Niels Bohr in fact based his model on the hydrogen atom. However, I wouldn't say that the Bohr Model can be correctly applied to ANY atom. Whilst it is an excellent approximation it is not truly accurate. Please don't forget that the Bohr Model is just that, a model, and a model is never as accurate as the real thing.
D.) Electrons exist in energy levels
true
It was after the scientist, named Neil Bohr
Iron is a metal element. Atomic mass of it is 56.
I would guess, it's because Bohr's layered model correctly explains connections between atoms (i.e. molecules) and radiation, but on the hand quantum mechanics say that electrons are exactly not kept nicely with orbits- they are all over the place.