ATOMIC AND MOLECULAR STRUCTURE

ATOMIC AND MOLECULAR STRUCTURE

1. MOLECULE: collection of bonded atoms.

2. ATOM: basic particle of an element, made up of protons, neutrons and electrons.

   • ELECTRON: negatively charged particle, orbit around the nucleus
     • NEUTRON: particle without electric charge, present in the core.

3. LINK: force that holds atoms together in a molecule

4. LEWIS: model to represent the structure of molecules, use dots to show valence electrons.

5. PROUST: law of definite proportions, establishes that chemical compounds always contain the same proportion by mass.

6. OCTET: tendency of atom to complete their valence shell with eight electrons.

7. WAVELENGHT: distance between two successive crests of a wave.

8. RADIATION: emission of energy though waves or particles.

9. JOB FUNCTION: minimum energy necessary to release an electron from a material.

10.  VALENCIA: ability of an atom to combine with other atoms.

11. QUANTUM NUMBER: set of four numbers that describe the position and energy of an electron in an atom.

12.  ENERGY LEVEL: regions where electrons can move around a nucleus.

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