An isotope of Bismuth (212,83) B. This isotope decays by alpha emission to form tellurium (TI)?
357686
Alpha decay is the emission of an alpha particle, which is a helium nucleus, that is, 2 protons and 2 neutrons.\n\n212Bi83 -> 208Tl81 + 4He2\n\nThe mass decreases by 4, the atomic number decreases by 2.\n\nTl has 208 - 81 = 127 neutrons.
964537
Tritium.\n\nThat is the isotope of hydrogen with one proton and two neutron in the nucleus.  It is used as a low grade radio-active activator in phosphorescent paint, replacing radium which is much more dangerous.\n\n(Science Teacher below is wrong: deuterium is a stable nucleon, it is thus not radio active)
19641
U238 decays into Thorium 234 then U234 then Radium then Radon then Polonium then Bismuth  and eventually it all becomes Lead
867056
barium: 1s22s22p63s23p64s23d104p65s24d105p66s2\n\nradium: 1s22s22p63s23p64s23d104p65s24d105p66s24f145d106p67s2\n\nsry if it looks a bit confusing without using exponetnts but im sure u could figure it out
612990
At the bottom of the perodic table...\n\nThey are technetium (at. no. 43), which was the first element to be synthesized, promethium (at. no. 61), astatine (at. no. 85), francium (at. no. 87), and the transuranium elements (at. no. 93 and beyond in the periodic table). Some of these elements have since been shown to exist in minute amounts in nature, usually as short-lived members of natural radioactive decay series (see radioactivity).\n\nThe synthetic elements through at. no. 100 (fermium) are created by bombarding a heavy element, such as uranium or plutonium, with neutrons or alpha particles. The synthesis of the transfermium elements (elements with at. no. 101 or greater) is accomplished by the fusion of the nuclei of two lighter elements. Elements 101 through 106 were first produced by fusing the nuclei of slightly lighter elements, such as californium, with those of light elements, such as carbon. Elements 107 through 112 were first produced by fusing the nuclei of medium-weight elements, such as bismuth or lead, with those of other medium-weight elements, such as iron, nickel, or zinc. Element 114 was first produced by fusing the nuclei of plutonium and calcium and subsequently by fusing the nuclei of lead and krypton, as was element 116. Element 115 was produced by bombarding americium with calcium, and element 113 resulted from the radioactive decay of element 115. The claim by Lawrence Berkeley National Laboratory to have created element 118 has been retracted.)\n\nThe transfermium elements are produced in very small quantities (one atom at a time), and identification is therefore very difficult because of half-lives ranging from minutes to milliseconds and the need to identify the products by methods other than known chemical separations. This has led to controversy over reported discoveries and over the naming of the elements. It has been predicted that one isotope of element 114—containing 114 protons and 184 neutrons—would be very stable because its nucleus would have a full complement of protons and neutrons. Termed an “island of stability,” its half-life might be measured in years. However, none of the three isotopes of element 114 synthesized as yet have as many as 184 neutrons, and their half-lives are still in the millisecond range.
1140191
Titanium is a chemical element in the periodic table that has the symbol Ti and atomic number 22. It is a light, strong, lustrous, corrosion-resistant (including resistance to sea water and chlorine) transition metal with a white-silvery-metallic colour. Titanium is used in strong light-weight alloys (most notably with iron and aluminium) and its most common compound, titanium dioxide, is used in white pigments. now only inner transition elements are radioactive, and transition elements are non radioactive, hence my friend titanium is not radioactive . take care
131141
Please edit your question to say what element you mean.  Same for the other one a few minutes earlier.
882242
Beta decay is a type of radioactive decay in which a beta particle (an electron or a positron) is emitted. In the case of electron emission, it is referred to as "beta minus" (β−), while in the case of a positron emission as "beta plus" (β+).\n\nCheck out the first link (Colorado) for a very basic explanation.  The Wikipedia entry is very confusing.
730469
You missed the electron changes.\n\nThe bismuth electon change is +3 to 0 for a change of 3\n\nThe Sn electron change is +2 to +4 for a change of 2\n\nSo all the Bi species need a 2  and the Sn species need a 3.\nThen fill in the O and H.
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Radium\nI  INTRODUCTION \n\nRadium (Latin, radius,”ray”), symbol Ra, chemically reactive, silvery-white, radioactive metallic element. In group 2 (or IIa) of the periodic table, radium is one of the alkaline earth metals. The atomic number of radium is 88.\n\nRadium was discovered in the ore pitchblende by the French chemists Marie Curie and Pierre Curie in 1898. They discovered that the ore was more radioactive than its principal component, uranium, and they separated the ore into many chemical fractions in order to isolate the unknown sources of radioactivity. One fraction, isolated by use of bismuth sulphide, contained a strongly radioactive substance that the Curies showed was a new element, polonium. A highly radioactive barium chloride fraction was treated to remove the radioactive substance, which was discovered to be a new element, radium.\n\nII  PROPERTIES AND OCCURRENCE \n\nRadium-226 metal melts at about 700° C (about 1292° F), and has a relative density of 5.5. The element oxidizes immediately upon exposure to air. The element is used and handled in the form of radium chloride or radium bromide and practically never in the metallic state.\n\nRadium is formed by the radioactive disintegration of uranium and is consequently found in all uranium ores. Radium is present in uranium ore to the extent of one part of radium to three million of uranium. It is extracted from the ore by the addition of a compound of barium that acts as a “carrier”. The chemical properties of radium are similar to those of barium, and the two substances are removed from the other components of the ore by precipitation of barium and radium sulphate. The sulphates are converted into carbonates or sulphides, which are then dissolved in hydrochloric acid. The radium is separated from the barium as the end result of successive crystallizations of the chloride solutions.\n\nOf the isotopes of radium, ranging in mass number from 206 to 232, the most abundant and most stable is the isotope of mass 226. Radium-226 is formed by the radioactive disintegration of the thorium isotope of mass 230, which is the fourth successive isotope in the decay series starting with uranium-238. The half-life of radium-226 is 1,620 years. It emits alpha particles, forming the gas radon.\n\nIII  USES \n\nRadiation from radium has a harmful effect upon living cells, and radium burns are caused by overexposure to the rays. Cancerous cells, however, are often more sensitive to radiation than normal cells, and such cells may be killed without seriously injuring healthy tissue by controlling the intensity and direction of the radiation. Radium is now used in the treatment of only a few kinds of cancer; radium chloride or radium bromide is enclosed in a sealed tube and inserted in the diseased tissue. When a radium salt is mixed with a substance such as zinc sulphide, the substance is caused to luminesce by the bombardment of the alpha rays emitted by the radium. Small amounts of radium were once used in the production of luminous paint, which was applied to clock dials, doorknobs, and other objects, to make them glow in the dark.
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helium neon argon krypton xenon radon\nyou probably do not need to know ununoctium because it was just discovered, is radioactive, and radioactively decays in a few seconds.
811194
Tellurium\nAntimony\nArsenic\nGermanium\nSilicon\nBoron
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Not an element; yes its still the king of hardness\nThere are experiments ongoing with low-speed nuclear bombardment of iridium with smaller nuclei which are producing very thin layers of great density that approaches the hardness of diamond.
330558
I'm guessing you meant "What element is named after a failed Greek god?"\n\nWell I think you mean titanium but you could mean tantalum(Tantalus, strictly speaking, isn't a god but he was Zeus' son).
4518
well, i am not positive, but i suspect that it's because of alpha decays.  most heavy radioactive elements like uranium and thorium decay into other more stable elements like lead, by the emission of an alpha particle.  an alpha particle is basically a helium nucleus - two protons and two neutrons.  the alpha nucleus picks up a few electrons from the environment when it's released and voila, you get elemental helium.
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Itanium\nItanium 2\nPentium M\nPentium 4EE, 4E\nEM64T\nPentium EE 955
353253
Fine-structure constant, alfa = 1/137,03599911\n\nSo, 250.0000001/alfa =\n= 250.0000001 * 137,03599911 =\n= 34258,9997912