Chapter 13 – States of Matter Pressure (P) – the amount of force per unit area. Pressure=F/a or P=F/a Pascal’s Principle “Any change in pressure at a point on a confined fluid is transmitted throughout the fluid”. Any change is transmitted throughout the fluid. Buoyancy & Archimedes Principle “When an object is submerged in a fluid‚ it displaces a certain volume of that fluid. The amount of force pushing upward on the object is equal to the density of the fluid (Ï) times the acceleration
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Bioquímica Repaso Examen 1 Chapter 1: Introduction to Biochemistry 1.1 Biochemistry is a Modern Science • By synthesizing urea‚ Friedrich Wöhler showed that compounds found in living organisms could be made in the laboratory from inorganic substances. He used the inorganic compound ammonium cyanate. • Two major breakthroughs in the history of biochemistry are especially notable: o Roles of enzymes as catalysts o Roles of nucleic acids as information carrying molecules.
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PRACTICAL III: THE BEHAVIOUR OF AMINO ACIDS IN SOLUTION Abstract In this practical the acid-base behaviour of amino acids was assessed. Amino acids are amphoteric. They have the basic (amine) and the acidic (carboxylic) functional groups. These show the same type of equilibrium reactions that all weak acids and bases undergo‚ and the relative amount of each can be altered by adjusting the pH of the solution. For this practical glycine was used as a model to show this unique nature of
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the smallest unit of matter that still retains the properties of an element. Neutrons - electrically neutral Protons - one unit of positive charge Electrons - one unit of negative charge Atomic Nucleus - the center of an atom Dalton - the same as the atomic mass unit or amu. Atomic Number - the number of protons‚ which is unique to that element Mass Number - the sum of protons plus neutron in the nucleus of an atom. Atomic Mass - the total mass of an atom. Isotopes - different atomic
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You can also read the examiner’s report for each question. 1. (i) atoms of the same element with different numbers of neutrons/different masses (1) 1 (ii) 79Br 35 protons‚ 44 neutrons‚ 35 electrons (1) 81Br 35 protons‚ 46 neutrons‚ 35 electrons (1) 2 (iii) (1s2)2s22p63s23p63d104s24p5 (1) 1 [4] 2. (i) iodide has been converted to iodine (1) (with correct use and spelling
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unit | |Proton |Nucleus |1 unit |+1 unit | |Neutron |Nucleus |1 unit |0 | [pic] Terminology |Term |Definition | |Atomic/proton number |Number of protons in a nucleus of an atom | |Nucleon/mass number |Sum of the number of protons and neutrons in the
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information in the following table: Protons Neutrons Electrons Isotope Symbol 27 32 27 5927CO 76 124 76 200 76 OS 6 8 6 14C 21 24 21 45 21Sc 3. Give the number of valence electrons for each of the following: 1. Ba--2 2. Al--3 3. P--5 4. Se--6 5. Br--7 6. K--1 4. Give short definitions for the following terms: 1. Atomic number—the ratio of the average mass of molecules to the twelfth of the mass of one atom. 2. Mass number---number of neutron and protons in an atomic nucleus 3. Atomic weight—the
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of titrant added at this point was determined to be 31.43 ml. This means 3.25 x 10-3 moles of NaOH were needed to react with 3.0 x 10-3 moles of HCl. Because HCl is a strong acid and NaOH is a strong base‚ the Ka is very high. Essentially all the protons in equilibrium come from the acid‚ and not from water. This means before the equivalence point‚ pH is determined almost exclusively by the strong acid‚ and after the equivalence point it is determined by the strong base. At the equivalence point‚
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Bio 1610 Vocabulary Words CH 1-4 CH 1 Emergent Properties- The greater good‚ bike parts in a box = useless‚ put them together = useful. Systems Biology- Using data to predict the function or result of an affect or variable has on a biological system. Biosphere- The earths atmosphere‚ the earths crust‚ the life in the ocean etc. Ecosystem- A community of organisms and their physical environment‚ ie- the dessert‚ a coral reef‚ a jungle etc. Community- All of the groups of animals or
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elements"? Because hydrogen has an atomic number of only “1” which means it only has one proton in its nucleus and it is the only element with only one proton in its nucleus also has one electron 2. What must happen in order for an atom to lose its electrical neutrality? In order for an atom to lose its electrical neutrality the protons and electrons would have to have an unequal number of positively charged protons versus negatively charged electrons must either gain or lose an electron 3.
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