Notes!

Chemical Bonding Lab

Last week we went to the library and got to practice making Lewis Dot Structures and identifying the electronic geometry of molecules. It was fun because we got to use the whiteboard tables and we got to make 3D models of the molecules which was really helpful in identifying the electronic geometry and determining the differences between the different types.

Periodic Table Activity

On Tuesday we were assigned a project to determine the placements of elements on a periodic table based upon the three sets of data that we were given, density, ionization energy, and a list of a reaction of each of the elements with a metal and a non metal, respectively. We did a similar project on Monday but it only contained one set of data with clues to a specific element. The one we got on Tuesday was a bit harder, but working with my lab partner, we were able to figure most of it out and I finished the last of it on my own.

The Unit Test

Helpful studying links:


Periodic Trends Practice

Practice Calculations

Quantum Number Practice

Electron Configuration Practice

Periodic Trends video

Electron Orbitals

QUIZ!

Last Friday we took our weekly quiz and I spent about 3.5 hours Thursday night studying for it. I printed off all the practice tests and worksheets and luckily all my hard work payed off because I got a 91% on it! That's like the highest grade I've gotten on a test or quiz since first quarter. I'm just hoping I can also get a good grade on the test tomorrow.  

Periodic Trends

This week we learned about periodic trends. There are four trends found on the periodic table, trends in atomic size, trends in ionization energy, trends in electron affinity, and trends in electronegativity.
For atomic size the trend is that as you move down a group the atoms tend to get larger. It is also noticed that as you move across the periodic table from left to right, the atomic size decreases. The trend for ionization energy is that it increases as you move up and to the right. For electron affinity and electronegativity the trend is also that it increases as you move up and to the right.
Therefore the element Cs has the largest atom, He has one of the highest ionization energies, and the most electronegative element is F because Noble gases do not normally combine with other elements so electronegativity is not a valid term for these elements.