Artem Ilyayev Ap Bio 1) An element is to a(n) ___________ as an organ is to a(n) _______________ Answer - b - compound; organism 2) In the term trace element‚ the modifier trace means Answer - a - the element is required in very small amounts. 3) Compared to 31P‚ the radioactive isotope 32P has Answer - b - one more neutron 4) Atoms can be represented by simply listing the number of protons‚ neutrons‚ and electrons - for example‚ 2P+; 2n0; 2e- for helium. Which atom represents the 18O isotope
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AP Chemistry Final Exam Review ESSAY. Write your answer in the space provided or on a separate sheet of paper. 1) Explain the difference between a qualitative and a quantitative measurement. Provide examples to illustrate this difference. Answer: A qualitative measurement is a measurement that gives descriptive‚ nonnumeric results; a quantitative measurement is a measurement that gives definite‚ usually numeric results. "The rock is heavy" would be a qualitative measurement. "The rock weighs 110
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Honors Chemistry Notes Unit 1 • Matter- Anything that has mass and volume and anything that has the property of inertia. -Quantitative. -Can be solid‚ liquid‚ gas. • Inertia- Ability to resist changes in its motion. -Change in motion could be terms of speed or distance. -A car that moves after it has stopped. • Mass- The amount of matter in an object. -The balances that you use in laboratory measure mass‚ not weight. -SI unit is kilogram (kg). • Conservation of Mass- The law states that
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AP Chemistry Analysis of Alum * Purpose: * In this lab we performed several tests to determine if our crystals were actually aluminum potassium sulfate. * Procedures: * Materials: * Chemicals: * Aluminum potassium sulfate‚ 2.5 g * Equipment – Part 1: * 150 mL beaker * Bunsen burner * 2 capillary tubes * Mortar and pestle * Notched stopper to hold thermometer *
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Chemistry IGCSE Paper 6 revision guide You can change the temperature and concentration used (not both at the same time though) You need to keep the diameter of the conical flask the same‚ if it is thinner then the cross will disappear sooner‚ the cross also has to be the same‚ volumes too (This set up is mostly if you want to test the gases‚ otherwise you can use the standard set up) The limestone cycle: 1. Burn the limestone
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Subject: Chemistry Topic: The Periodic Table The periodic table is a classification of all the elements based on ATOMIC NUMBER. It is composed of HORIZONTAL PERIODS and VERTICAL GROUPS which contain the elements arranged: *the order of INCREASING ATOMIC NUMBER *in the relation to the ELECTRON STRUCTURE of the atoms *in the relation to their CHEMICAL PROPERTIES (Criteria Used For Placing ELEMENTS in the Periodic Table) 1. ATOMIC NUMBER 2. NUMBER OF SHELLS (PERIOD) 3. NUMBER OF OUTER
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CHEMISTRY SAMPLE PAPER - I CLASS - XII Time : Three Hours Max. Marks : 70 General Instructions 1. All questions are compulsory. 2. Question nos. 1 to 8 are very short answer questions and carry 1 mark each. 3. Question nos. 9 to 18 are short answer questions and carry 2 marks each. 4. Question nos. 19 to 27 are also short answer questions and carry 3 marks each 5. Question nos. 28 to 30 are long answer questions and carry 5 marks each 6. Use log tables if necessary‚ use of calculators is
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Chemistry 2202 Review Final Exam Chapter 2: The Mole 1. Isotope – atoms of an element that have the same number of protons but different numbers of neutrons. Ex. The three forms of oxygen are called oxygen-16‚ oxygen-17‚ and oxygen-18. They all have 8 electrons and are written as 16/8 O (8 protons + 8 neutrons)‚ 17/8 O (8 protons + 9 neutrons)‚ and 18/8 O (8 protons + 10 neutrons). 2. 3. Mass Number – the sum of the protons and neutrons in the nucleus of one atom of a particular
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…………………………………………………………………………. 12 Chemical Changes Experiment 3 …………………………………………………………………………. 15 Classification of Matter Experiment 4 ………………………………………………………………………….17 Chemical Nomenclature: The Language of Chemistry Experiment 5 ………………………………………………………………………….22 Water of Hydration Experiment 6 ………………………………………………………………………….25 Gases Experiment 7 ………………………………………………………………………….27 Oxygen Experiment 8 …………………………………………………………………………
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1 Class XII Chemistry Ch 5: Surface Chemistry Chapter Notes Top Concepts / Key learnings: 1. 2. 3. 4. 5. 6. Adsorption: The accumulation of molecular species at the surface rather than in the bulk of a solid or liquid is termed as adsorption. Adsorbate: The substance which is being adsorbed on the surface of another substance is called adsorbate. Adsorbent: The substance present in bulk‚ on the surface of which adsorption is taking place is called adsorbent. Desorption: The process of removing an
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