1. Periodic Trends and Light Calculations

2. Where are the alkaline earth metals located?
Group 2

3. Which noble gas is located in period 2?
Neon (Ne)

4. What halogen is located in period 4?
Bromine (Br)

5. Which of the following sets of elements are all in the same period on the periodic table? A)manganese, calcium, argon B)zinc, copper, nitrogen C)sulfur, magnesium, silver D)rubidium, iodine, cadmium
Rb, I, Cd

6. Sn-4 energy levels of shielding
Which of the following elements experiences the most shielding? Al Sn Li K
Sn-4 energy levels of shielding

7. Br – same amount of energy levels, most amount of protons
Which of the following elements would have the smallest atomic radius? Br Ni Cr K
Br – same amount of energy levels, most amount of protons

8. __________ _________ is a measure of the energy it takes for an atom to lose 1 electron.
Ionization energy

9. Which of the following elements would have the lowest ionization energy? Rb Sr Na Li
Rb – same amount of shielding as Sr but less protons to pull its electrons closer

10. Which of the following elements would have the highest ionization energy? K Ca As Br
Br – more protons with same amount of shielding makes the nucleus hold on to electrons tighter

11. __________ is the tendency of an atom to pull shared electrons closer to its nucleus.
Electronegativity

12. Which of the following elements has the lowest electronegativity. Si
Which of the following elements has the lowest electronegativity? Si Ba Br O Ba

13. Which of the following elements has the greatest electronegativity. Se
Which of the following elements has the greatest electronegativity? Se Ca P O O

14. What is the frequency of light with a wavelength of 560. nm?
Use the speed of light equation
5.36 E 14 Hz

15. Calculate the energy of a photon with a wavelength of 4
Calculate the energy of a photon with a wavelength of 4.72 E -6 m (need to use both equations from notes)
Use the wavelength to find frequency
Speed of light = (wavelength) X (frequency)
Frequency = 6 .36E13 Hz
Use the frequency to find the energy of the photon
Energy = (Planck’s Constant) x (frequency)
4.21 E -20 J