Hey, I was just looking for some help, if you or anyone could help me review over this draft of my assignment. I've put a lot of time into it. I would really someone to pre-review before submitting it. Thank you so much.

Week 6 Homework for Chapter 12, 13, 15 #1: Why is it not possible to see an atom using visible light? Atoms are smaller than the wavelengths of visible light and so canmt be seen using any visible light microscope. #2: How many types of atoms can you expect to nd in a pure sample of any element? An element consists of only "1 " type of atom. #3: Are the majority of elements on the periodic table metallic or non- metallic? Metallic #4: a} What does a spectroscope do to the frequencies of light coming from an atom? The spectroscope separates the light into its color components. b) How can this information be used? Spectrograph, sometimes called a spectroscope or spectrometer, breaks the light from a single material into its component colors the way a prism spl'rts white light into a rainbow. It records this spectrum, which allows scientists to analyze the light and discover properties of the material interacting with it #5: which has more potential energy: an electron close to an atomic nucleus or one far from an atomic nucleus? If you need help. the lecture summarizes this. An electron has more potential energy when it is far from the nucleus. #6: a) Which contributes more to an atom's mass: electrons or protons? Protons contribute more to an atom's mass b) Which contributes more to an atom's size: electrons or protons? Electrons contribute more to its size. #7: why doesn't the repulsive electric force of protons in the atomic nucleus cause the protons to y apart? The presence of a strong attractive force between nucleons in the nucleus prevents protons from repelling out of the nucleus. #8: what is meant by the half-life of a radioactive sample? The time required for half of the atoms in a sample of a radioactive isotope to decay. #9: In which atomic nucleus do nucleons have the least mass? Which element marks the transition from nuclear fusion to nuclear fission? (It's the same element) If you need help this is summarized in the lecture. Iron #10: What kind of nuclear power is responsible for sunshine? Thermonuclear \"Fusion" #11: rank the following three types of radiation by their ability to penetrate this page of your text. from highest to lowest. (a) alpha particle (b) beta particle (c) gamma ray Highest: gamma ray > beta particles > alpha particle :Lowest #12: why is lead found in all deposits of uranium ore? Uranium decays into lead. #13: The age of the Dead Sea Scrolls was determined by carbon-14 dating. The Dead Sea Scrolls are made of parchment the processed a) Why was carbon14 dating a good method to use? Since they were written on PARCHMENT, "an animal skin martial used for writing" it breaks down quickly, carbon-14 is useful for dating creatures that died in the past few thousand years, not millions of years ago. b) Why oould carbon dating have NOT been used if they had been carved on stone tablets? This method of dating requires a material that was once living. #14: which electrons are represented by an electron-dot structure? The valence electrons are represented by an electron-dot structure. #15: how does an ion differ from an atom? An atom has no electrical charge. Ions have an electrical charge because they have an imbalance of protons and electrons. #16: to become a negative ion, does an atom lax or gain electrons? It gains electrons #17: Elements from which two portions of the periodic table tend combine to form ionic bonds? If you are having difficulty the lecture should help. Metals and nonmetals tend to form ionic bonds. Nonmetals and nonmetals tend to form covalent bonds. #18: Which type of elements tend to form covalent bonds? Non-metallic elements. #19: What is a dipole in terms of chemistry? A bond or molecule whose ends have opposite charges. #20: are induced dipoles permanent? No, they are temporary