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The Begenius School of Atom Model Drawing

The Begenius School of Atom Model Drawing. Everything you wanted to know to pass your next quiz on atoms. Democritus – ancient Greek that named the atom after “atomos” which means indivisible. Aristotle argued against this idea suggesting that matter could be divided infinitely.

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The Begenius School of Atom Model Drawing

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  1. The Begenius School of Atom Model Drawing Everything you wanted to know to pass your next quiz on atoms

  2. Democritus – ancient Greek that named the atom after “atomos” which means indivisible. Aristotle argued against this idea suggesting that matter could be divided infinitely. John Dalton – first chemist that made the first table of elements and was the first to suggest that atoms of gold were unique and different from atoms of iron. He had a theory called the billiard ball model of atoms…suggesting that atoms were like balls that collide with each other and have unique masses and properties. Dalton proved in 1802 that atoms were real and he pictured them as small billiard balls. He used an example that if you had some gold each atom would be solid gold. People, Theories, and Models

  3. In1897 J.J. Thomson published a theory called the Plum Pudding Model of an atom. His model put the first electrical quantities into the model called electrons. The electrons were seen as negative charges and the pudding part of the model was seen as a positively charged material making up the rest of the atom. Plum Pudding Model More about People, Theories, and Models

  4. In 1911 Ernest Rutherford disproved the plum pudding model by proving the existence of a nucleus which held most of the mass and an empty space between the nucleus and the orbits of electrons. Eventually this grew into our model that has protons and neutrons in the nucleus and electrons in orbits spinning around the nucleus. Even more about people, theories and models

  5. Niels Bohr applied quantum physics to the model of the atom in 1913 and added a specific orbital/energy level concept to the atom. Each atom is now seen as having a specific pattern of space where electrons can be found called s, p, d, and f orbitals. Final notes about people, theories and models

  6. The electron cloud model puts all of the parts of the atom into high speed motion, and suggest that we never really know exactly where electrons will be but that there are regions where we may find them. Erwin Schrodinger is credited with the cloud model. The cloud model represents a sort of history of where the electron has probably been and where it is likely to be going.  The red dot in the middle represents the nucleus while the red dot around the outside represents an instance of the electron.  Imagine, as the electron moves it leaves a trace of where it was.   This collection of traces quickly begins to resemble a cloud.  Final notes about people, theories and models

  7. How to Draw an Atom • First step is to find the element on the periodic table. • Which row or period is it in? This tell you how many orbitals it has. • What is its atomic number? This tells you the number of protons and electrons it has. • What is the atomic mass (weight)? Round it off and subtract the atomic number and you have found the number of neutrons. • Record these answers in a table like this Check out an example.

  8. ?-hold places in orbitals that could have an electron but do not have one - - - - - ? o o + o o + ? + + o o + ? ? ?

  9. Try to draw carbon, and oxygen and see how you do. • Ask Mr. Manning when you return to class on Wednesday for help if you do not understand. • Try the review slides that follow.

  10. Review • This ancient Greek named the atom. Democritus • This Greek argued against the existence of atoms. Aristotle • He was the first chemist and made the first table of elements John Dalton • In 1897 he published the Plum Pudding Model which put the electron into the atom. J.J. Thomson • He put the nucleus into the atom model Ernest Rutherford • He put the specific regions of electrons called orbitals into the model. Niels Bohr • He helped develop the electron Cloud model. Erwin Schrodinger

  11. Review Continued • The particle with a positive charge in the nucleus of the atom Proton • The particle in the nucleus of the atom with no charge Neutron • The particle with a negative charge that spins at high speed around the nucleus of the atom Electron • Particles numbers that are the same as the atomic number Protons and electrons • Particle number the same as the atomic mass or weight None • Particle number found by subtracting the atomic number from the atomic mass whole number part Neutron • The atomic structure number found by the row or period on which an element is found Number of orbitals • The symbol used to represent spaces in an atom where electrons could be found but are not found Question mark

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