Chapter 2 Practice questions

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Presentation transcript:

Chapter 2 Practice questions

Do Now 10/1 How are ions formed? Fill in the following table Use the average atomic mass of chlorine determine the relative abundance of 35Cl and 37Cl Species Protons Neutrons electrons 30 35 28 7Li+ 15 16 14N3- 3 7

Which of the following is correct? Emission and absorption spectra both provide evidence for: The existence of neutrons b. the existence of isotopes c. The existence of atomic energy levels d. the nuclear model of the atom. Ultraviolet (UV) Infrared (IR) A High energy Short wavelength Low energy Low frequency B Long wavelength C High frequency D

1. The diagram shows the lowest five electron energy levels in the hydrogen atom Deduce how many different frequencies in the visible emission spectrum of atomic hydrogen would arise as a result of electron transitions between these levels. 3 b. 4 c. 6 d. 10 2. Identify which of the following provide evidence to support the Bohr model of the hydrogen atom? I The energy of the lines in the emission spectra of atomic hydrogen II the energy of the missing lines in the absorption sepectra of helium as seen from the sun. III the relative intensity of the different spectral lines in the emission spectrum of atomic hydrogen a. I only b. II only c. I and II d. I and III

Bohr models (basis for electron configuration) Draw a bohr model of sulfur Draw a bohr model for calcium

Bohr models (basis for electron configuration) Draw a bohr model of sulfur Draw a bohr model for sodium Draw a bohr model for calcium