Benefits of the Ozone Gas Ozone (O3) is a natural gas comprising of three oxygen atoms and is a particularly an unstable fume. Ozone gas is visibly blue in color and has a sturdy odour regularly described as the whiff of air after a springtime electrical thunderstorm. Some people also refer to the odour as like the smell of watermelons. Normal oxygen (O2), which living beings except plants breathe, has dual oxygen atoms and is invisible and odourless. Despite its being a natural gas ozone can be manufactured
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the acceleration a body has when a force is applied. The greater the mass, the slower the acceleration for the same force. Matter is thus a general term for the substance of which all observable physical objects consist. Typically, matter includes atoms and other particles that have mass, but this definition confuses mass and matter, which are not the same. Different fields use the term in different and sometimes incompatible ways; there is no single agreed scientific meaning of the word "matter,"
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of two objects First law of Thermodynamics Energy may be converted from one form to another, but the total must be conceived in any interactions. (Energy is conserved) THE UNCERTAINTY PRINCIPLE When get to very small dimensions, e.g. size of atom, very small amounts of momentum, we can never seem to know anything that we wanna know about it. There're pairs of quantity NB: You can violate the first law of thermodynamics for a very very short time, which has to be smaller than the Planck's
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Compounds: Some matter around you is uncombined elements (copper, oxygen, sulfur) these 3 elements combine chemically to form a compound when conditions are right. Formulas: Chemical formula tells what elements a compound contains and the exact number of the atoms of each element in a unit of that compound Subscript tells you how many atoms of an element. Symbol has no subscript unit only has 1 element. A unit of H2O contains 2 hydrogen atoms and 1 oxygen atom Atomic stability: The electric forces
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form of a table: The elements are listed by increasing atomic mass, Elements with similar chemical properties in the same column. The modern periodic table of the elements (based on Mendeleev's earlier version) arranged by atomic number, not mass one of the great classifying schemes in science an indispensable tool to chemists. 2 Earliest Periodic Table 3 http://www.news.cornell.edu/stories/June06/Mendeleev.jpg Modern Periodic Table – Element Types metal 4
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compound a molecular compound of carbon, not including CO(g), CO2(g), and HCN(g) hydrocarbon a compound containing only carbon and hydrogen atoms saturated hydrocarbon a hydrocarbon with only single covalent bonds between its carbon atoms alkane a saturated hydrocarbon H H C H (a) H (b) Figure 2 Two representations of the methane molecule: (a) the structural formula and (b) the ball-and-stick model 8 Chapter 1 • Organic Compounds Alkanes Organic chemistry is the study of
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Unit F321: Atoms, Bonds and Groups Definitions to Learn 1. Atoms and Electron Structure Isotopes atoms of an element with different numbers of neutrons and different masses Relative atomic mass average mass of an atom relative to 1/12 of the mass of a carbon-12 atom Relative isotopic mass mass of a particular isotope relative to 1/12 of the mass of a carbon-12 atom Orbital a region that can hold up to 2 electrons with opposite spins 1st ionisation energy energy change when
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BSC 1020 - Biology of Humans EXAM 1 Study Guide Exam Instructions • Exam 1 is scheduled for Saturday, February 13, 2016 from 11:00am-12:15pm • It will be held on the Tampa campus, in CW Bill Young Hall (CWY), which is located on USF Maple Dr., across from the Social Science bldg. (SOC), and north of the gym/rec center (REC). Campus maps can be found at: http://www.usf.edu/administrative-services/parking/maps/index.aspx o Because there are 316 students, we’ll split the class between
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Task 2 Short Answer Questions 1a. 1b. 1c. 1d. 1e. 1f. 2a. 2b. 2c. 2d. 2e. 2f. 3. Draw a labelled diagram showing the bonding that occurs within a piece of potassium. Potassium is a metal that has one electron in its outer shell. It is a metal therefore contains delocalised electrons. 4a. 4b. 4c. 4d. 5a. Electricians’ screwdrivers have plastic handles but the shaft of the screwdriver is metal.( Still need to find diagrams) `Electrician
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these isotopes. (Ans: 79Br: 51 %, 81Br: 49 %) [Apr 2014] 4. An element has two isotopes, P and Q. The ratio of percentage abundance of P to Q is 0.32. The isotopic mass of P and Q are 36.9695 and 34.9689, respectively. (a) Find the percentage abundance of isotope P and Q. (Ans: P: 24.24%, Q: 75.76%) (b) Determine the average atomic mass of the element. (Ans: 35.45 a.m.u.) [Sep 2012] 5. The number of atoms present in a sample of formic acid, HCOOH was found to be 1.736 ×
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