10/26 Chemistry Recording - Diagraming Atoms

https://youtu.be/qs2swfOW-TM

10/26 Chemistry update and homework due 11/2

Hi folks,

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

10/19 HS Chemistry recording - Introduction to the Periodic Table

https://youtu.be/0cu452LExqk 

10/19 Chemistry class update and homework due 10/26

Hi folks,

Today we began our study on the periodic table and the elements.  Next week we'll get more into even more detail about the atoms and the elements. 

If you'd like to take a look at a periodic table, here's the one we used in class today.

Homework due next week: 

Read the text book pages 89 - 92 

Do Review questions pg 95 #'s 27 - 34 
Do Exercise questions on pg. 98 #'s 28 - 31 and 33-34 
Do Problems on pg 98 #'s 3 and 4

10/12 Chemistry update and homework due 10/19

Hi folks,

Today we took a bit of time to look at a few density related problems and discuss how to tackle them.  Then we did a lab practicum.  I put together five different substances and the students had to figure out which substance was which by finding the densities of the substance.  It took a lot of patience and precision and on the whole the students did a great job.

Homework for next week is to do the enclosed worksheet.  I'll send along answers in a separate email so you can check yourself.  Please feel free to email me with questions on this.  Some of these are a little bit more than we've done in class and they may take some thought.  Just keep in mind what volume is, what mass is and that density is the amount of mass in a given volume.  By the way, skip #6. I've included the answers as well. Good luck!  

Answer key to homework due 10/12

10/5 Chem update and homework due 10/12

Hi folks,

Today we spent time learning about and measuring the densities of several different materials.  In the process, we also practiced our lab techniques.  

For homework this week read this website and do the enclosed .pdf.