Braulio's Chemistry blog

So in chmistry class we did a lab and the Question was Is reactivity a periodic property? So the elements and things we used we're Sodium, Magnesium, Potassium, Copper, Calcium, and Phenomenological. So in this lab we got some water in two beakers and three test tubes. We put Sodium and Potassium in the beakers. When Sodium was added the reactivity was sudden and it ran on top of the water. The Potassium in other hand burst into a flame . In the other three beakers we put Calcium, Magnesium, and Copper. Calcium had turned the water pink and then gassed up. Magnesium turned the water foggy and then the piece of Magnesium had turned pink. Copper ad only turned foggy. So because the periodic table is periodic we can see a pattern with the elements in reactivity from up to down and left to right in decreasing order. So like Potassium was more reactive than Calcium because the potassium showed more reactivity than Calcium. So like Potassium is is lower than Calcium in the peri...

During these weeks I have learned how electrons work with light and wavelengths. I have learned how light is shown and how the periodic table is separated. The periodic table is separated by metals, non-metals, and one more thing but I don't seem to remember now. I also learned that elements have orbitals which is where the electrons are hold in as well. These next weeks I will try to learn the lesson so well that I can teach some one and they will learn it well as well. I will also try to get my schedule better and manage time better than I do now.

On Thursday, October 26, I had to do a lab in my chemistry class. In the lab we had to find identities of unknown solutions by comparing them to the known solutions he had. During this lab we first had to identify the flame that the Bunsen burner makes when it burns certain metals. The metals we used were Calcium Chloride, Barium Chloride, Copper (II) Chloride, Lithium chloride, Potassium chloride, Sodium chloride, and Strontium chloride. The Bunsen burner and the metals made                                                          Calcium- Brighter Orange                                                          Barium- Yellow-Green                   ...

These two weeks in Chemistry class we have had labs having to do with chemical and physical change and learned atomic mass of elements and their isotopes. I have learned how to calculate the relative atomic mass of an element with its isotopes with this formula               (Mass # of Isotope 1) (% abundance 1) + Mass # of Isotope 2) (% abundance 2)                                                                        100 To improve the next two weeks I will do my best to turn in my work in their deadlines and take notes the best I can, as well as ask if I am confused or lost in any topic.

Recently in these past two weeks iv'e completed work o physical and chemical changes in chemistry class. We have gone more in dept with the physical and chemical by classifying them by change or property. I have also learned about breaking down chemical and physical changes to homogeneous or heterogeneous.To improve my understanding more in my chemistry class I really have to get into the habit of doing the notes so I do not go clueless into class.  

The task's I've learned this week was the scientific numbers, well like a refresh from it but this time it sounds more clear. Something I've learned recently was the chemical reactions like if they are either physical or chemical reactions. Next time I go to class I will try to understand everything so I can do things without doubting myself.

                Today in chemistry class we were asked the question, Do we get what you pay for? So in the lab we used Hot Cheetos to measure if we do get what we pay for. So we checked our Hot Cheetos bags and it said it contained 28.3g. We used accuracy and precision to measure our bags. Accuracy was measured in the net weight + or - .1g (either 28.2g or 28.4g). Precision was measured as having a variance of less than or equal to .2 grams.                  We started by measuring the net weight of the bags of Cheetos. The bags measured bag 1 30.8g, bag 2 30.4, bag 3 29.8, and bag 4 30.6g. Later we took out the chips out of the bags and measured them again bag 1 1.5g, bag 2 1.5g. bag 3 1.5, and bag 4 1.5. Then we got the difference for each bag. The precision we got was .9g.                So our answer to this project was, No we don't get what we pay f...