Name: Date: Chemistry 1A – Final Review – Multiple Choice 1. 1.00 cm is equal to how many meters? a. 0.01 b. 100. c. 10.0 d. 0.0100 2. 1.00 cm is equal to how many inches? (1 inch = 2.54 cm) a. 0.394 b. 0.10 c. 12 d. 2.54 3. 4.50 ft is how many centimeters? a. 11.4 b. 21.3 c. 454 d. 137 4. The number 0.0048 contains how many significant digits? a. 1 b. 2 c. 3 d. 4 5. Express 0.00382 in scientific notation
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States of Matter Gases, liquids and solids are all made up of microscopic particles, but the behaviors of these particles differ in the three phases. The following figure illustrates the microscopic differences. | | | Microscopic view of a gas. | Microscopic view of a liquid. | Microscopic view of a solid. | Note that: * Particles in a: * gas are well separated with no regular arrangement. * liquid are close together with no regular arrangement. * solid are tightly
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Hydrogen Hydrogen is the first element of the Periodic table, and is represented by the symbol H. It is the lightest element, weighing on average 1.00794 amu (atomic mass units), and it mostly consists of one proton and one electron, with no neutrons. It bonds with almost every other element of the periodic table, and is the most important component of organic matter, after carbon. The discovery of hydrogen Hydrogen gas was first artificially synthesized by Phillip von Hohenheim (known as
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manganese to create this. In order to get magnetism out of these metals, scientists use what’s called a buckyball. A buckyball is a molecule that’s completely carbon. This soccer-ball-shaped molecule has strong electron affinity which is similar to electronegativity. The carbon atoms are able to accept electrons from the metals and can be measured. Essentially these carbon atoms pull the electrons out of an adjacent metal. The scientists take these buckyballs and make a thin layer of them, followed by a
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The periodic table can give the majority of information on any elements. Based on the reading all matter is composed of elements, which are substances that cannot be broken down into other substances. Looking at Nitrogen, we can see that the atomic number is seven (number of protons in the nucleus), the symbol is N, and the atomic weight of Nitrogen is 14.01. Nitrogen is one of four elements that make up living cells. A Nitrogen atom has protons and neutron in the central nucleus with two electrons
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M1: Metallic bonding: Atoms within a solid metal are held together by metallic bonding, a metal bond is an electromagnetic attraction between electrons (delocalised so they’re shared between all the atoms in the structure, a sea of electrons) and the positive ions held within the lattice. The positive ions become attracted to these free electrons which form the lattice, this lattice structure and their metallic bonding gives them high melting points and good electrical conductivity properties. Due
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University of Phoenix Material What Is Life? Read each statement. Write a 100-word summary explaining how that media piece supports that statement and include reference citations. 1. Find a media piece—article, video, presentation, song, or other—related to the scientific method, creating hypotheses, or designing experiments. Include the link or reference citation for the piece and describe how it helped you better understand how the scientific method is used to create hypotheses and experiments
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oxides of Period 3 elements (sodium to chlorine) and their structures. Argon is obviously omitted because it doesn't form an oxide. A quick summary of the trends The oxides The oxides we'll be looking at are: |Na2O |MgO |Al2O3 |SiO2 |P4O10 |SO3 |Cl2O7 | | | | | |P4O6 |SO2 |Cl2O | Those oxides in the top row are known as the highest oxides of the various elements. These are the oxides
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chemical nature of the elements and their compounds (except hydrocarbons—compounds composed of carbon and hydrogen). Involves substance that do not contain carbon or substances from non-living things. 2. Organic Chemistry, branch of chemistry in which carbon compounds and their reactions are studied. A wide variety of classes of substances—such as drugs, vitamins, plastics, natural and synthetic fibers, as well as carbohydrates, proteins, and fats—consist of organic molecules. Study of all substance
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behind biomolecules What is biochemistry? Well, it’s the study of biology at a molecular level. So the emphasis of this unit is the biological significance of chemical molecules. As part of the course, there are six biological molecules that you need to know about: CH2OH Carbohydrates O H H OH OH These molecules are one of many vital to life. They are used for energy (for both storing and supplying energy), and in some cases can be used structurally, such as cellulose Lipids
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