Please enable JavaScript.
Coggle requires JavaScript to display documents.
Atomic Structure - Coggle Diagram
Atomic Structure
Bohr's Model
The Bohr model is a modification of the earlier Rutherford model. The Bohr model is important because it describes most of the accepted features of atomic theory without all the high level math of the modern verison
The Bohr model is a planetary model in which the negatively charged electrons orbit a small, positively charged nucleus similar to the planets orbiting the sun. The gravitational force of the solar is mathematically akin to the coulomb force between the positively charged nucleus and the negatively charged electrons
- Main Ideas/Points of the Bohr Model:
- Electrons orbit the nucleus in orbits that have a set size and energy.
- Radiation is absorbed or emitted when an electron moves from one orbit to another
- The energy of the orbit is related to its size. The lowest energy is found in the smallest orbit
-
Dalton Atomic Theory
- Main Ideas:
- All matter is comprised of tiny definite particles called atoms
- Atoms are indivisible and indestructible
- All atoms of a particular element share identical properties, including weight
- Atoms of different elements con different mass
His Theory - Dalton hypothesized that the law of conservation of mass and the law of definite proportions could be explained using the idea of atoms. He proposed that all matter is made of tiny indivisible particles called atoms which he imagined as solid, massy, hard, impenetrable, movable particles
Democritus Theory
Democritus believe that atoms were uniform,solid,hard, incompressible and indestructible and that they moved in infinite numbers through empty space until stopped. Differences in atomic shape and size determined the various properties of matter
Democritus did an experiment to try and see how it would work, to prove his theory. The experiment he did was taking a simple seashell and breaking it into halves over and over again unril it was left as a powder. Unable to break the powder down any further
JJ Thompson Model
Cathode Ray Tubes
-
Test - Thomson placed two oppositely charged electric plates around the cathode ray. The cathode ray was deflected away from the negatively -charged electric plate and towards the positively-charged plate. This indicated that the cathode ray was composed of negatively-charged particles
Conclusions:
- Thomson concluded that the cathode ray is composed of negatively-charged particles
- These subatomic particles can be found within atoms of all elements
Erwin Schrodinger
Erwin Schrodinger took the Bohr atom model a step forward. He used mathematical equations to describe the likelihood of finding an electron in a certain position. This atomic model is know as the quantum mechanical model of the atom