Chemistry October 1/09

Today in chemistry we learned about protons, electrons, neutrons, and ions. Ions are atoms or molecules that have an electric charge on it, cations would be a positive ion, and anions would be a negative ion.

Heres a video giving you a good and clear understanding of what a proton neutron and electron is.



Protons:
the number of protons would be the atomic number in an element. By adding or removing neutrons there would be no change in the element. Protons have a positive charge and can be located in the nuclei

Electrons:
electrons are 1800 times smaller then the protons. Chemical reactions occur between electrons in different atoms and compounds. Electrons have a negative charge and can be located outside of the nucleus

Neutrons:
By adding or removing neutrons there is no change in the element because neutrons and protons almost have the same mass. Neutrons have no charge and can be located inside of the nuclei with the protons.



We also learned about the periodic table today. Families form vertical columns in the periodic table, while periods are horizontal rows. Elements change from metal to non-metals going from left to the right. All the elements of a family have similar traits and characteristics to one another.

Another thing we learned today in chemistry 11 is that some elements have a latin and a english name examples would be:
copper - cuprum
gold - aurum
iron- ferrum
lead - plumbum
silver - argentum


We also learned about naming the formula for the compounds examples would be:
potassium iodide - KI
barium chloride - BCl2
lithium bromide - LiBr
sodium hypochlorite - NaCLO

Here is a link to find out more about how to write and name formulas for compounds. This neat little link also gives you a practice test once you have read and understand how to name formulas for compounds.
http://www.geocities.com/tjachem/symname.html