Hi folks,
Today we really dove into the periodic table. We talked about atomic number, atomic mass, size trends of atoms, atomic orbitals and valence electrons. We also introduced diagraming atoms. Next week we will continue working with valence electrons.
HW this week is to:
Read the text book pgs.
57-62
Answer Review Questions #'s 23-32
Answer the following questions
1. How many protons, neutrons and electron 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. Diagram the following atoms. Then tell me how many valence electrons it has, what period it's in, and what group.
a. Magnesium
b. Neon
c. Sodium
d. Chlorine
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, An, Kr, Ag, Sn, Xe, Au, Hg, Pb, Rn
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