Which statements are true for an electron in the 1s orbital of
hydrogen ?
1. The potential energy of the electron is negative.
2. The total energy of the electron is constant.
3. The kinetic energy of the electron is positive.
The
electron configuration of an element is 1s^2 2s^2 2p^6. Describe
what most likely happens when an atom of this element comes near an
atom having seven valence electrons.
What is the radius, in angstroms, of the orbital of an electron
with
n = 9
in a hydrogen atom? (Assume that the Bohr constant and radius
are 2.179 ✕ 10−18 J and 5.292 ✕ 10−11 m,
respectively.)