3. What is the region around the atomic nucleus where the electron is mostlyfound?A. FrequencyB. Energy LevelC. Atomic OrbitalD. Atomic Emission Spectrum

What information about the structure of a hydrogen atom can be gained from its emission spectrum?A. Most of the mass of the atom is in its nucleus.B. A hydrogen atom contains one proton and one electron.C. The electron in the hydrogen atom is held near the nucleus.D. The electron may exist in any of several energy levels

A difference of 2.3 eV separates two energy levels in an atom. Whatis the frequency of radiation emitted when the atom make atransition from the upper level to the lower level?

Electrons closest to the nucleus have the ____________ energy

Spectra have been used to study the arrangements of electrons in atoms.An emission spectrum consists of a series of bright lines that converge at high frequencies.Such emission spectra provide evidence that electrons are moving from.A. lower to higher energy levels with the higher energy levels being closer together.B. lower to higher energy levels with the lower energy levels being closer together.C. higher to lower energy levels with the lower energy levels being closer together.D. higher to lower energy levels with the higher energy levels being closer together.

describe the number of electrons in atoms, their energy levelsand atomic orbitals