Periodic table W.A.C 09/25/17

Have you ever wondered how the periodic table came to be? The periodic table is the place where you can find every element that had been discovered so far. There were three big changes to the periodic table and those three changes is what I will be talking about. These new changes to the periodic table has been due to recent discoveries like noble gases.

The first periodic table was cylinder like. The table had helical graph wrapped around the cylinder. The list was published without any graph and It also used geological terms, it also included compounds on the list. Since it was published with things like this the table itself was completely ignored until the work of mendeleev.

The second periodic table was organized into groups of three called triads. A triad is three elements that are similar so they were grouped together based on that. The table had all of the known elements at the time which was 62. All similar elements were put into a single column even if two elements were going to be in a single box. The table left no room on it for any newly discovered elements.

The discovery of the proton made this the most modern and accurate of the versions of the periodic tables I have talked about. The discovery of the proton led to the discovery of the nuclear charge (atomic number). The atomic number (number of protons) changed the organization of the table to fit that way going from 1 to 10 and so-on. The periodic table was based on the periodic law.

The periodic table has changed a lot due to recent and not-so recent discoveries by amazing people who have change the world a lot. These changes occurred after someone made a discovery which in turn could lead to more discoveries like plutonium and the noble gases. We have to change the periodic table a lot because we have to get the most accurate data possible so we don’t make false discoveries.

Istopes 09/17

http://imgarcade.com/anion-cation.html

Summary this week in class we learned about:Isotopes, Cations, and Anions. Isotopes are atoms that have lost or gained electrons most of the atoms in the world are isotopes. If an atom loses and electron then it becomes a cation since cations hove lost electrons they have a positive charge. If an atom gains electrons then it is an anion since anions have lost electrons they have a negative charge. Since all isotopes have lost or gained electrons that would make then ions which are atoms that don't have a neutral charge.


SP2: Developing and using models
This week in class we had been working with models on making an isotope and showing how making an electron move into or leave the atom affected the atom. The information that we gathered was that atoms usually become unstable after losing or gaining an electron, we also could tell how many electrons were lost or gained in the atomic abbreviation this information proved to be useful in further work that we did in the class like worksheets.

Atoms 09/08

https://www.livescience.com/37206-atom-definition.html

Summary: This week in class we learned about atoms. Atoms are the things that make up all of the elements and all of the matter that exists or has ever existed. There are three main parts of an atom: The Proton, the Neutron, and the Electron. The proton has a positive charge it also controls the element and atomic number of the atom. The neutron has a neutral charge and balances out the atom also the number of protons plus the number of neutrons is the atomic mass. The electron has a negative charge and for every positive charge in the atom the electron cancels one out.

SP2: Developing and using models

This week in class we went to a website about making atoms. On the website we made a model atom we had ten protons, 13 neutrons, and 10 electrons to work with. We got to see the atomic mass and charge on the atom as well as the element based on the amount of neutrons, electrons, and protons we had added. Sadly, we could only put 3 elements on our worksheet even though I am interested in them all.

Scientific method 09/1

https://www.pinterest.com/lorilynntrimble/chem-scientific-method-variables-graphing/

Summary: This week in class we learned about the scientific method. The scientific method is how scientists ask and test various questions. We use the scientific method to provide a basic outline on how humans gather information. At the end of the scientific method it is important that you share the information you gathered so you may benefit the human race as a whole.

SP5: Using mathematics and computational thinking

This week in class we used computational thinking to predict how long it would take for our whirly bird to reach the ground. After we had done that we had to calculate the average time that it would take for the whirly bird to fall to the ground.