Reflection of week of 9/21/15

Sg Chem 2 reflection paper

Obi Ilozor 3rd hour

This week in Sg Chem 2, we did a fair amount of activities. We learned mostly about famous scientists who discovered elements and properties of atoms. We watched a movie on Gay Lussac, who experimented with many gases and studied electricity, and other famous scientists. Two really big scientists were Priestly and Dalton who layed the foundation for modern atomic theory. Also, Joesph Prust developed the law of definite proportions which is key in modern atomic theory. One really big discovery or assertion was Avagardo's hypothesis. We also learned about the compositions of compounds. Also how mass of 2 elements in a compound affect how many attach together. Overall, it was a cloudy week full of information that is to vast to state in a mere one page reflection, but I will try my best to present a thorough and informational overview of this week.

We white-boarded this activity today. It was about compounds and their masses. The compounds have ratios that determine how many of an atom are in a compound per another atom. In this case, O and C are the types of atoms and their are 4 O's per 3 C's

We learned about Avagardo's law this week. It shows that atoms will react in ways where certain ratios of atoms are in a compound. Atoms split up and bond together with other atoms to make compounds. Just like in this example, two hydrogen combine with one oxygen and the rest of the oxygen don't combine with anything.                                                                            

Prusts Law of definite proportions is like Avagardo's but builds upon it. It states that all compounds of the same type are made up of the same proportion of atoms. Take water for instance, it is always composed of two hydrogen and one oxygen. If there is more oxygen than a two to one ratio, some of it will not bond. Just like the video of a lab we watched this week as well. Oxygen gas was left over after the reaction. The reaction also caused a jolting reaction within the test tube.

Iodine was a big discovery back then by 2 scientists that named it iode. They weren't really remembered as much as the two scientists who elaborated on their discovery. Those two were Gay Lussac and Dalton. One of them named this new substance iodine but I think that Gay Lussac published his article on it one day before Dalton.