Unit 1 Review!

This unit we covered a lot! We started with significant figures, and conversions. An example of a significant figure is 0.00700 there are 3 significant figures in that number. 700. Then we moved on to the periodic table. An element is building materials of all matter. And a compound is an element combined with another element. We learned how to read the periodic table such as protons, neutrons, an electrons. The number of protons are the same as the atomic number. And combined protons and electrons are the amu of an element. Then we went into more depth and learned what an isotope is. An isotope is an element with a different number of neutrons. After that, we ventured into nuclear reactions including beta, alpha decay and fission and fusion. Alpha decay, the atomic number decreases by 2 and the amu decreases by 4. Beta decay, the atomic number increases by one. I explain what fission and fusion are in my review below. Moreover, we did an awesome lab that taught us what happened when the flame changes color. The atoms are getting excited and then slowing down, when they come back together a release of energy occurs and the flame changes color! After that lesson, we went back to the periodic table and learned about valence shells and valance electrons ect. I define those in an earlier blog if you need explaining! Have you ever thought about charges in elements? Well we learned how to balance them, and know what a cation and anion are. Cation is positive, anion is negative. Cation usually relates to a metal, and anion usually relates to a nonmetal. The lessons got more complicated from here, we explored polyatomic ions, and how to change the name in a compounds ect. Lastly, we learned how conductive compounds were, and how to figure out the bonds they are in. Such as ionic bond, is entirely nonmetals, they conduct and dissolve. There are 3 other bonds that compounds can fit into! That pretty much sums up unit 1!! Good luck on the test everyone! You are all smart and can do it :) study hard!

Unit 1 Review

 

 

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