1. Before Bell Rings Grab Paper From Side Table Turn in your Examining Emission Spectra Lab on the Front Table Have your Bohr Model WS out for me to check

2. ETD
Draw the Bohr Model for Iron (Fe)

3. ETD

4. ETD 4 2019 # of protons = # of electrons
# of neutrons = atomic mass (Rounded to the nearest whole number) - # of protons
Rings fill 2, 8, 8, 18, 18, 32, 32.

5. Goggles + Hair + Sleeves

6. Flame Test Lab ~2 mins @ Each Station

7. Ions An atom with an unequal # of electrons and protons
Group of elements with an overall charge
Ionic Compounds
Wants to get to “Happy” state
Left Side- Loses
Right Side- Gains
Ions are charged particles. These can be a single atom of an element with a charge or a group of atoms with an overall charge. When it is an ion made of just one element, it forms an ion because it wants to get to a full outer ring of electrons. If the neutral atom’s outmost ring has only a few electrons, it will lose these electrons to make a full outer ring. We see this with the Sodium (Na) ion. When Na is neutral, it has only one electron in its outer ring. It loses this electron when it forms an ion because after it loses the electron, it will have a full outer ring. Elements in the first two columns of the periodic table (left side) lose electrons in order to get to a full outer ring when they form ions. Elements on the right side have almost full rings, so they want to gain electrons. We see this with Fluorine. It has seven electrons in its outer ring when it is neutral, so it gains an electron when it becomes an ion. This extra electron makes its outer shell full. Remember that ions are charged particles. The way to tell the charge is by subtracting the number of electrons from the number of protons. So if an element had 10 electrons and 12 protons, it would have a +2 charge. If it had 10 electrons and 8 protons, it would have a -2 charge.

8. Ions

9. Bohr Model of Ions
The Bohr model of ions is the same as the Bohr model for neutral atoms, but it will have a different number of electrons. Remember that when an ion is formed from an element, it can only gain or lose electrons, not protons. If we change the number of protons, we change the element. So first, figure out whether the atom will lose or gain electrons based on its outer ring and location on the periodic table. Using this information, you can figure out how many electrons the ion will have by adding or subtracting the correct amount of electrons from the total number the neutral atom has. Then, once you know how many electrons the ion will have, fill in the shells just like before, starting with 2, then 8, then 8, …. until you run out of electrons. Remember that the outer shell should be full of electrons when a neutral atom becomes an ion.

10. HWK
Exciting Salts WKST- Due next class