Atomic Models

Question 1

Planetary model

Answer 1

• Niels Bohr
• Electrons ORBIT the nucleus
  
  • Orbits have specific size and energy
  • energy relates to it’s size
• Electrons can move between each shell when gaining or loosing energy

Question 2

Nuclear model

Answer 2

• Ernest Rutherford
• atoms mainly immobile
• positive charge is in the center of the atom
• electrons move around the nucleus

Question 3

Atomic model

Answer 3

• John Dalton
• Atoms are small, can not be seen
• Can’t be divided, created, destroyed
• an element = identical atoms
• different elements = different properties
• atoms combine to from “compounds”

Question 4

Quantum mechanical model

Answer 4

• Erwin Schrodinger
• electrons move around the nucleus in a cloud called the orbital
• the orbital helps us predict the area where we can find electrons
• the closer to the nucleus, the higher chance to find electrons

Question 5

Plum - Pudding model

Answer 5

• Joseph John Thomson
• First introduced that an atom has + and - charges
• An atom is electrically neutral
• Electrons are fixed in the positive sphere