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What can happen when an atom absorbs energy?

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Presentation on theme: "What can happen when an atom absorbs energy?"— Presentation transcript:

1 What can happen when an atom absorbs energy?
4.3 Modern Atomic Theory What can happen when an atom absorbs energy? - an increase in kinetic energy or a phase change energy may be absorbed by an atom, then emitted as light

2 agreed with Rutherford’s model but added something to it
4.3 Modern Atomic Theory Niels Bohr ( ) agreed with Rutherford’s model but added something to it energy levels – the possible energies that electrons in an atom can have

3 when it loses the energy it emits it as light
4.3 Modern Atomic Theory when an atom gains energy an electron may move to a higher energy level when it loses the energy it emits it as light no two elements have the same set of energy levels, so the emit different colors of light

4 4.3 Modern Atomic Theory Electron Cloud Model electron cloud model – model of the most likely locations for electrons in an atom (deals with probability)

5 Electron Cloud Model of a Hydrogen Atom
4.3 Modern Atomic Theory Electron Cloud Model of a Hydrogen Atom

6 4.3 Modern Atomic Theory

7 orbital – region of space where an electron is likely to be found
4.3 Modern Atomic Theory orbital – region of space where an electron is likely to be found

8 Energy Level, Orbitals, and Electrons
4.3 Modern Atomic Theory electron cloud – a good approximation of how electrons behave in their orbitals Energy Level, Orbitals, and Electrons Energy Level Number of Orbitals Maximum # of Electrons 1 2 4 8 3 9 18 16 32

9 atoms emit light when their electrons return to ground state
4.3 Modern Atomic Theory electron configuration – arrangement of electrons in the orbital of an atom ground state – electrons are all in their lowest possible energy levels (most stable) excited state – one or more electrons are in a higher energy level than usual (least stable) atoms emit light when their electrons return to ground state

10 electron configuration energy levels
Chapter 4 Vocabulary isotopes proton nucleus mass number electron configuration energy levels atomic number neutron orbital electron cloud electron ground state excited state

11 isotopes proton nucleus mass number energy levels atomic number
Chapter 4 Vocabulary isotopes proton nucleus mass number energy levels atomic number neutron orbital electron cloud electron ground state excited state

12 isotopes proton mass number energy levels atomic number neutron
Chapter 4 Vocabulary isotopes proton mass number energy levels atomic number neutron orbital electron cloud electron ground state excited state

13 isotopes proton mass number energy levels atomic number orbital
Chapter 4 Vocabulary isotopes proton mass number energy levels atomic number orbital electron cloud electron ground state excited state

14 isotopes proton mass number energy levels atomic number electron cloud
Chapter 4 Vocabulary isotopes proton mass number energy levels atomic number electron cloud electron ground state excited state

15 isotopes proton mass number energy levels atomic number electron cloud
Chapter 4 Vocabulary isotopes proton mass number energy levels atomic number electron cloud electron ground state

16 isotopes proton mass number energy levels electron cloud electron
Chapter 4 Vocabulary isotopes proton mass number energy levels electron cloud electron ground state

17 proton mass number energy levels electron cloud electron ground state
Chapter 4 Vocabulary proton mass number energy levels electron cloud electron ground state

18 proton mass number electron cloud electron ground state
Chapter 4 Vocabulary proton mass number electron cloud electron ground state

19 Chapter 4 Vocabulary proton electron cloud electron ground state

20 Chapter 4 Vocabulary proton electron ground state

21 Chapter 4 Vocabulary proton electron

22 Chapter 4 Vocabulary proton

23 Chapter 4 Vocabulary

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