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Transcript
QUANTUM MECHANICAL MODEL OF THE ATOM ESSENTIAL QUESTION: WHAT IS THE CURRENT MODEL OF THE ATOM? THE PROBLEM WITH BOHR: Pros Cons Explained hydrogen’s line Doesn’t explain the line spectrum. spectra of any other element. Showed that an atom has Data indicates that quantized (specific) electrons don’t move energy levels. around nucleus in circular orbits. IT WAS THEREFORE ASSUMED IT WAS WRONG. QUANTUM MECHANICAL MODEL • Current model of the atom. • Based on evidence from a field of study called quantum mechanics. • Very complicated equations are used to describe areas in space around the nucleus where e- are likely to be found. • These areas are called orbitals. Several types – classified by shape. A WAVE FUNCTION FROM QUANTUM MECHANICS: PROGRESSION OF ATOMIC THEORY: TYPES OF ORBITALS: S – orbitals d – orbitals p – orbitals ORBITALS
