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Flashcards do conjunto (24)
- 1Isotope:Atoms with the same number of protons but different number of neutrons
- 2Radioisotope:An isotope with an unstable nucleus that decays into a different, often stable isotope
- 3Types of decay reactions that occur so radioisotope emits its energy:1- Alpha decay, 2-Beta decay, 3-Gamma decay, 4-Fission, 5- Fusion
- 4What is carbon dating?When plants incorporate CO2, and keeping C-12/C-14 ratio constant. However, ratio will change when the plant dies.
- 5How is it helpful to measure the ratio of an isotope?Because it helps scientists figure the age at which the plant died
- 6Cobalt Radiotherapy:Ionizing radiation is used to treat disease.
- 7Cobalt has one stable isotope(59). Cobalt(60) can be produced by exposing the...Cobalt 59 to neutrons in a reactor
- 8Iodine Radio-tracers:Iodine-131 and Iodine-125 are used to treat a condition called Hyperthyroidism
- 9Hyperthyroidism is...The overproduction of thyroid hormones by an overactive thyroid
- 10Atomic mass:Mass on the periodic table is a weighted average of the amount of each isotope
- 11R.A.M, stands for what? :)Relative Atomic Mass
- 12Atomic Radius:The distance from the centre of the atom to the outermost electron shell
- 13Factors affecting radius?Nuclear charge, Electron shells, Shielding, Electron-electron repulsion
- 14Trend of Atomic Radius in the Periodic table:-Decreasing # of protons in the nucleus from right to left, which increases atomic radius
-As you move down a group, the # of electron shells increases, so the atomic radius will increase - 15Electron Affinity:Energy with addition of 1 electron to a neutral atom
- 16Factors affecting E.A:Nuclear charge, Electron shells/shielding
- 17Trend of E.A in the periodic table:-As you move from left to right, the # of protons increases, which will increase E.A
-As move up a group, the amount of shells will decrease will will increase the E.A - 181st Ionization energy:Energy needed to remove 1 electron from the valence shell of an atom
- 19Trend of Ionization energy in the periodic table:-It increases as you move from left to right
- Decreases as you move up a group - 20Electronegativity:The ability if an atom to attract electrons onto itself
- 21Trend of E.N. in the periodic table:-Increase as you go from Left to right
-Increases as you go up the periodic table - 22The difference in E.N. tells us what?The type of bond formed
- 23Equation of E.N. ?E.N. = EN(higher) - EN(lower)
- 24-E.N < 0.5, then it is... -If 0.5< E.N. <1.7, then it is... -If it is 1.7 < E.N., then it is...-Slightly polar covalent
-Polar covalent
-Ionic
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- FlashCards sobre Sem título, criado por rama_ali14 em 14-01-2015.
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