Chapter 3:Arrangement of Electron in the Atom Flashcards
energy level
is defined as the fixed energy value that an electron in an atom may have.
ground state
of an atom is one in which the electrons occupy the lowest available energy level
excited state
of an atom is one in which the electrons occupy higher energy levels than those available in the ground state
Orbitals
is a region in space within which there is a high probability of finding an electron
Sublevel
is a subdivision of a main energy and consists of one or more orbitials of the same energy
Continuous Spectrum
The array of colours (from broken up light) from white light passed through a glass prism.
Line Spectrum
A series of narrow coloured lines shown by an electric current passed through a hydrogen discharge tube.
IR Range
n=3,4 or 5
Atomic Absorption Spectrometry
When white light passes through a gaseous sample of an element.It is found that the light that emerges
has wavelight missing
What are emission line spectrum used for?
Detecting the presence of elements (Different elements have different colours)
Limitations of Bohr’s Theory
- Failed to account for many of the lines in the emission spectra of atoms.
- Electron had a wave motion.
- High probability of finding an electron in a region in space.
- It didnt take into account the presence of sublevels
P-Orbitals
Dumbell-Shaped
S-Orbitals
Spherical
Uses of Atomic Absorption Spectrometry
- Detecting the presence of certain elements in materials dissolve in water.
- For measuring the concentrations of these elements.
What was the idea of quantisation Bohr introduced?
Electron can only have a quantum(fixed amount )