Set: PHY SCI test 3
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All 61 Terms
| | Term | Definition |
|---|---|---|
| |
John Dalton | developed the atomic theory |
| |
atomic theory | matter consists of indivisible units known as atoms which CAN BE NEITHER CREATED NOR DESTROYED,all atoms of the same elelment are identical |
| |
robert boyle | the father of chemistry |
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law of conservation of matter (mass) | in chemical composition or decomposition, there is no gain or loss of weight (mass). MASS CAN BE NEITHER CREATED NOR DESTROYED |
| |
law of definite proportions | when one element combines with another to form a compound, they do so in definite composition by weight (mass) |
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law of multiple proportions | when 2 or more elements combine to form more than one compound |
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H2O | molecule having 2 hydrogens and 1 oxygen |
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avagadros number | 6 X 10 to the 23 power |
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Mendeleev | created the periodical table |
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alkali metals | Li, Na, K, Rb |
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alkaline earth | Be, Mg |
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halogen | F, Cl, ,Br, I |
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inert gases | He, Ar, Xe |
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discovered the xray | Roentgen |
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discovery of radioactivity | Becquerel |
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discovery of the electron | Thomson |
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plum pudding model of the atom | JJ Thomson |
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photoelectric effect | light ejected electrons from a highly polished metal surface |
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atomic number | the total charge on the nucleus of an atom |
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quantum mechanics | there can be no more than 2 electrons |
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valence electrons | outermost electrons |
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atomic number (Z) | number of protons in nucleus |
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mass number (A) | sum of protons and neutrons (nucleons) in the nucleus |
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gamma rays | electromagnetic transitions in the nucleus |
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transmutation | one element changes into another element |
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binding energy | seperating a nucleus into free nucleons |
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nuclear fission | the separation of a nucleus into smaller nuclei |
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fusion | the fusion of light nuclei into heavier nuclei |
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sources of energy | wood,natural gas, petroleum, coal, oil, hydroelectric |
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insolation | incoming solar radiation |
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galaxies | large collection of stars |
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hubble | found galaxies beyond the milky way |
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the big bang theory | the expansion of the universe as we know it today |
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concept of the atomic number | moseley |
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alpha decay | occurs for only the heavy elements |
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rutherford | nuclear model of an atom |
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value of solar constant | 1 |
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theory of a hydrogen atom | bohr |
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solar constant is measured in units of | kW/m2 |
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8o16 | most stable against beta decay |
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chemically active metal | 2-8-8-1 |
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inert gas | 2-8-8 |
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violet | most effective in ejecting electrons from a metallic plate |
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chemically active nonmetal | 2-8-7 |
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energy produced in a nuclear reactor | fission of heavy elements |
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energy produced in the sun comes from | fusion of hydrogen |
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neutrinos | massless particles emitted beta decay |
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molecular wright of c4h10 is | 58 |
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robert milikin | the oil drop experiment |
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the od experiment | measurement of the charge on electrons |
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ionic bond | transfer of electrons |
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mass number | the number of protons and neutrons in the nucleus |
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atomic mass | chemical properties of elements |
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gamma rays | the region of the spectrum that possesses the most energy |
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avagadros number | number of molecules in one gram of molecular mass |
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HR diagram displays | the spectral type of a star and its brightness |
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hubbles law leads to | big bang theory |
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development of photon theory | einstein |
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Ca has atomic number 20 is electrovalence is | +2 |
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F has atomic number 17 its electrovalence is | -1 |
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alpha scattering experiement has provided evidence to | nuclear model of the atom |
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kta2287 : Changed robert milikin is known for → the oil drop experiment to robert milikin → the oil drop experiment
kta2287 : Changed neutrinos are → massless particles emitted beta decay to neutrinos → massless particles emitted beta decay
kta2287 : Changed the od experiment lead to → measurement of the charge on electrons to the od experiment → measurement of the charge on electrons
kta2287 : Changed concept of the atomic number arose from → moseley to concept of the atomic number → moseley
kta2287 : Changed discovery of X-Ray → Roentgen to discovered the xray → Roentgen
kta2287 : Changed hubbles law supplys evidence to → big bang theory to hubbles law leads to → big bang theory
kta2287 : Changed rutherford proposed → nuclear model of an atom to rutherford → nuclear model of an atom
kta2287 : Changed energy produced in a nuclear reactor comes from → fission of heavy elements to energy produced in a nuclear reactor → fission of heavy elements
Last Message: 7 months ago
Most Missed Words
- John Dalton → developed the atomic theory - 2 misses
- law of definite proportions → when one element combines with another to form a compound, they do so in definite composition by weight (mass) - 2 misses
- alkaline earth → Be, Mg - 2 misses
- halogen → F, Cl, ,Br, I - 2 misses
- inert gases → He, Ar, Xe - 2 misses
- discovery of the electron → Thomson - 2 misses
- plum pudding model of the atom → JJ Thomson - 2 misses