Today we continued our discussion on atoms and got quite a bit deeper into the periodic table and reading its patterns and trends. This is the beginning of what will basically be a long and winding staircase of material. It's very important to understand each "stair" well from here on out. I've seen several students over the years get lost on one of the concepts and since each concept leads to the next one, all the concepts that follow are just that much harder to really understand. In other words, really take your time on this material.
Homework for this week is to complete the following questions.
1. How many protons, neutrons and electrons are in the following atoms
a. Aluminum
b. Antimony
c. Strontium
d. Oxygen
e. A positive ion of Gallium
f. A negative ion of Barium
2. Remember, the atomic weight of an atom is its protons plus its neutrons. With that in mind how many protons and neutrons are in the following atoms. Which ones would be isotopes?
a. Arsenic atomic weight 75
b. Phosphorus atomic weight 27
c. Aluminum atomic weight 29
3. Create a Bohr diagram for the following atoms.
a. Lithium
b. Barium
c. Neon
d. Radium
e. Argon
f. Indium
4. Draw the shape of the periodic table and label:
a. Non-metals
b. transition metals
c. halogens
d. Alkali metals
e. Alkali Earth metals
g. Noble Gasses
Memorize the following atomic symbols and what they stand for: (Index cards would be great for this!)
H, He, Li, C, N, O, Ne, Na, Mg, Al, Cl, Ar, K, Ca, Fe, Ni, Cu, Kr, Ag, Sn, Xe, Au, Hg, Pb, Rn, P
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