Chapter 4.2 The Quantum Model of the Atom. Electrons as Waves Scientists of the early twentieth century Questioned: 1.Why did hydrogen’s electron exist.
Concept of the Atom Democritus 400 B.C.E., Greece Democritus.
Atomic Models Atomic Models Please wait to turn in your homework! Be in your seat when the bell rings!
Inonisation part 2, orbiatls and electronic configuration.
Chapter 3 Atomic Theory
ATOMIC STRUCTURE More Clues about the Nature of Elements.
1.Draw a dot-cross diagram for a sodium atom 2.Write an equation to show the first ionisation energy of sodium (its value is +496kJmol -1 ) 3.Write an.
Chapter 3 Atomic Theory. Early Theories 4 elements.
Inonisation part 2, orbiatls and electronic configuration
Objectives… To use LED lights to… – Understand how light is produced – Understand how LED lights work – Calculate wavelengths of light – Calculate frequencies.