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Chemistry 1 - Quantum Mechanical Model of the Atom
Models of Atomic Structures: Past to Present
Terms in this set (31)
Electrons were supposed to be embedded in a positive cloud.
Thomson's Plum Pudding Model
Presents the atom as having a small nucleus where the positive charge and mass of the atom is concentrated.
Rutherford's nuclear model
The electrons were supposed to move in orbits around the nucleus, but they could orbit only in certain specified energy levels; they cannot exist between energy levels.
The Bohr Model
Electrons occupy orbits that are at fixed energies and radii.
The Bohr Model
The proponent of The Bohr Model. A Danish Physicist, proposed a planetary model of the atom IN 1913.
The bigger the orbit...
the farther the electron is from the nucleus and the higher its energy with a higher quantum number.
When an electron gains...
it moves to a higher energy level, and when it loses the same amount of level.
An electron in the lowest energy level where it remains stable is said to be...
one which is in a higher energy level and is more reactive is in the excited state.
Particle nature has wavelike properties was proposed by...
Louis de Brogile in 1924
Proponent of Schrodinger's Model
Erwin Shrodinger in 1926
Electron within an atom is treated as a wave rather than as a particle.
Schrödinger wrote and solved mathematical equations to...
Describe the energy and the location of electrons in atoms.
Presents the electrons as not having exact paths around the nucleus in orbits and that they cannot be located precisely within an atom.
The Quantum Mechanical Model
The four quantum numbers
* n (energy)
* l [azimuthal or angular momentum quantum number] (shape)
* ml [magnetic quantum number] (orientation)
* ms [spin quantum number] (spin)
Electrons occupy orbital in the order of increasing energy.
Aufbau Building-up Principle
4p 5s ...
Electrons occupy orbitals of equal energy singly so that all the orbitals contain one electron each, before pairing up.
Hund's Rule of Maximum Multiplicity
Two electrons may occupy an atomic orbital only if they have opposite spins. The maximum number of two electrons that can occupy an orbital is two.
Pauli Exclusion Principle
It is written by distributing to the various orbitals the number of electrons that the atom has.
Are used to represent the principal energy levels and sublevels or orbitals, respectively.
Numbers and letters
The arrangement of electrons in an atom can also be represented by...
Valence electrons are represented by dots surrounding the symbol of the atom or element it is called the...
Lewis electron dot symbol or Lewis electron dot formula
Are formed by metal and non-metal elements.
Are formed by both non-metal elements.
This is a neutral particles that results from
In this type of bonding, the concern was the total number of valence electrons which indicates whether the atom has the tendency to lose or gain electrons in order to complete an octet of valence electrons.
Focuses in the given number to the number of unpaired valence electron/s.
What is the monomer of Proteins?
What is the amino acid of Nucleic Acid?
What is the monomer of Lipids?
What is the monomer of Carbohydrates?
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