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 of oxygen? Answer - b - 8p+; 10n0; 8e- 5) The atomic umber of sulfur is 16. Sulfur combines with hydrogen sulfide. Based on the electron configuration
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Atomic Number: 34 Atomic Radius: 117 pm Atomic Symbol: Se Melting Point: 220.5 C Atomic Weight: 78.96 Boiling Point: 685 C Electron Configuration: [Ar]4s23d104p4 Oxidation States: 6‚ 4‚ -2 Selenium is a non metallic chemical element‚ member of the group XVI of the periodic table. In chemical activity and physical properties it resembles sulfur and tellurium. Selenium appears in a number of allotropic forms: the most popular are red amorphous powder‚ a red crystalline material‚ and a
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Chemistry Equipment Symbols 1. Test Tube 2. Boiling Tube 3. Beaker 4. Conical Flask 5. Test Tube Holder/ Tongs /Clamp Stand 6. Measuring/Graduating 7. Funnel 8. Pipette Cylinder 9. Spatula 10. Tripod 11. Bunsen Burner 12. Glass Bulb 13. Burette 16. Condenser Pipette Changes of State Filtering Solutions 03-Nov
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Mendel’s ‘factors’ are now called genes Genotype refers to the specific allelic composition of an individual Independent assortment: During gamete formation‚ the segregation of any pair of hereditary determinants is independent of the segregation of other pairs Random sampling error N+N sperm N egg 3n endosperm Degrees of freedom Tetrad (bivalent) Mitosis produces daughter cells that are genetically identical Meiosis produces daughter cells that are not genetically identical
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Nutrients…………………………………………………………………………...5 III. Different kind of pollutants………………………………………………………………6 a. Organic pollutants…………………………………………………………………6 b. Inorganic pollutants……………………………………………………………..6 c. Metals……………………………………………………………………………6 d. Radioactive Isotopes………………………………………………………………7 1. Alpha………………………………………………………………….7 2. Beta……………………………………………………………………7 3. Gamma………………………………………………………………7 4. Neutrons…………………………………………………..…………...7 IV. How are pollutants transported through water?.........
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ores such as pitchblende‚ uraninite‚ carnotite‚ and autunite. It can also be found in phosphate rock‚ lignite (brown coal) and monazite sand. There three different types of isotopes that can be found: uranium-234‚ uranium-235 and uranium-238. All three isotopes are radioactive‚ but uranium-235 is the only fissionable isotope that can be used for nuclear power. (Gagnon) Uranium-235 makes up about 0.7 percent of the uranium that can be found naturally. It can be used for both nuclear power production
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|WEEK |LEARNING OBJECTIVES |LEARNING OUTCOMES |ACTIVITIES |REMARKS | |1 |FORM 4 ORIENTATION | | |4/1 – 6/1 |
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On the morning of August 6‚ 1945‚ a B-29 bomber named Enola Gay flew over the industrial city of Hiroshima‚ Japan and dropped the first atomic bomb ever. The city went up in flames caused by the immense power equal to about 20‚000 tons of TNT. The project was a success. They were an unprecedented assemblage of civilian‚ and military scientific brain power-brilliant‚ intense‚ and young‚ the people that helped develop the bomb. Unknowingly they came to an isolated mountain setting‚ known as Los Alamos
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in which it becomes a liquid metal. This is caused when immense amount of pressure is added to it such as when it’s found in gas like planets including Jupiter and Saturn. Hydrogen consists of 3 isotopes including hydrogen-1‚ known as protium‚ hydrogen-2‚ deuterium‚ and hydrogen-3‚ tritium. The first isotope if the most abundant one‚ while the third one is the least. Henry Cavendish‚ an English scientist who developed hydrogen by mixing zinc along with hydrochloric acid‚ first identified it as a distinct
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a) I definately agree with this statement and how science is ever changing. The scientific method begins by asking a question about something. After asking a question the next step is to form a hypothesis or educated guess. A repeatable expieriment is then created to test said hypothesis‚ and a large amount of data is collected. Data collection then leads Scientits to analyze the data and come up with a conclusion to see if the hypothesis was proven correct or incoreect. If the hypothesis is proven
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