What type of element is uranium (U)...rare earth, noble gas,or transition metal?
148756
It's metal and it's an Actinides.
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The gas in the balloon is helium. These helium atoms were once the alpha particles of radioactive decay trapped with other particles beneath the ground in natural gas deposits. For each uranium atom that decays to lead, 8 alpha particles are emitted. An alpha particle with 2 electrons is a helium atom.
337610
Transitional metals are the metals in the middle of the periodic table of elements.
921116
I'm not directly giving you the answers, you have to know how to do this stuff, but I'll give you the process to get to each.\n\n9: Americium and Curium (wikipedia!)\n\n10: Potassium ion wants to be like the noble gas closest to it (the one right before it), so it loses 1e- to get there and be K+.  If that's not a choice, then look for another ion, positive or negative, that adds up to the electronic configuration of the aforementioned noble gas. (1s2 2s2 2p6 3s2 3p6), 18 total e-'s...\n\n11: Mg is in column 2, things in the same period tend to be chemically similar.  Find the other one in the choices that's in that column\n\n12: U235 and U238 are isotopes, same atomic number, different weight.  If you change the number of protons, you change the atomic number, so that wouldn't be U anymore.  Changing electrons can make ions, but not change weight.  So different number of neutrons for the same element makes an isotope.\n\n13: Same explanation as above, it'll also be Hydrogen's atomic number because it's an isotope.\n\n14: shell 2 contains the 2s and 2p subshells.  2s can hold 2 because it's an s orbital.  2p can hold 2 per p orbital, and a p subshell has 3 p orbitals, so 6.  Total would then be...\n\n15: If an atom loses electrons, it's LOSING -1 per electron lost, so it's becoming more positive.\n\n16: Which element in that list only has 1s shell? Which one has a  stable ion as just a proton or with a configuration like Helium (1s2)?\n\n17: Inert elements are on the far right of the periodic table.  They are inert because they have 8 valence (outer shell) electrons (or 2 in Helium's case) so they can't take anymore and are stable.  Look at your periodic table or count up electrons for each of those atomic numbers.  Only one of them will have 8 in the outer shell...
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Some of the elements while in gaseous state.
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Hands down... gallium...\n\nGallium is a silvery metal that melts at 30 degree Celsius... thats 86 degree Fahrenheit... the stuff can be a nice solid chunk sitting on a table, and literally melt through your fingers when you pick it up... its the only substance I am aware of that has a melting point of approximately the temperature of the human body...
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Look at your periodic table. \n\nHydrogen - 1s1\nHelium - 1s2\nLithium - 1s2 2s1\nGo to Neon - 1s2 2s2 2p6\nArgon - 1s2 2s2 2p6 3s2 3p6\nKrypton - 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6\n\nSo, let's say you need Silver (Ag)\n[Kr] 5s2 4d9\n\nIt's perfectly acceptable to use a noble gas in brackets to represent the configuration.\n\nI hope this give you an idea how to write it all.
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Uranium is an element and does not have any pros and cons.\n\nHowever, the USE of uranium as a power supply, which is what I think you mean, has benefits and problems.\n\nBenefits -\nCheap, cleaner than fossil fuels, long-lasting\nProblems - \nRadioactive forever, highly toxic/poisonous, must refine it to use it, where do you dispose of it?, "not in my back yard" syndrome for location of nuclear plants
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1) 2\n2) 4\n3)17\n4) Ar\n5) 118\n6) metallic\n7) 92U239\n8) has its valence electron farther from the nucleus\n9) americium and curium\n10) Ne0\n11) 20\n12) neutrons\n13) 1\n14) 8\n15) +2\n16) hydrogen\n17) 18\n18) 17\n19) an ion\n20) proton
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1. Platinum-pt\n2. Boron-b+3\n3. Galium-ga+3\n4. Nitrogen-n-3\n5. Carbon-c\n6. Silicate-Si+4\n7. Fluorate-f-1\n8. Iodate-I-1\n9. Astatate\n10. and the ionic formulae for all of the transition elements that you kn\nget more here below
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Itanium\nItanium 2\nPentium M\nPentium 4EE, 4E\nEM64T\nPentium EE 955
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Because electrons fill the 4s orbital before going into any d orbitals.  Which is what makes a transition metal a transition metal.  Their valence electrons are in d orbitals.
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Iridium (IPA: /ɪˈɹɪdiəm/) is a chemical element in the periodic table that has the symbol Ir and atomic number 77. A dense, very hard, brittle, silvery-white transition metal of the platinum family, iridium is used in high strength alloys that can withstand high temperatures and occurs in natural alloys with platinum or osmium. Iridium is notable for being the most corrosion resistant element known and for its significance in the determination of the probable cause of the demise, by a meteorite strike, of the dinosaurs. It is used in high temperature apparatus, electrical contacts, and as a hardening agent for platinum.
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Do you mean what where are the d sublevels? If you do they are the transition metals.  But i do not think that is your question. Do you mean the fourth row? That would be the latest last noble gas configuration then s2 of next level up then d2 of same level of last noble gas. I hope it helped. Maybe you should clarify your question.
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For this you should see the electronic configuration of those elements.\nThe metals with atomic number 21-30 are transition metals; they have outer 4s shell complete and the inner 3d orbital is 'in the process' of being filled up. They all have 2 outermost electrons in the 4s2 shell. \nIonization energy is the energy required in removing an outer most electron from a neutral atom. The transition metals and calcium have their outermost 2 electrons in 4s which means that their electrons experience the same force of attraction from the nucleus (being at the same distance from the nucleus) ; hence almost the same amount of energy will be required to overcome that attractive force to remove the electrons.
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Elements with this property are called noble gases or inert gases.\n\nHelium, argon, neon, kyrpton, xenon and radon.
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Well, they're both transition metals, so they can have multiple charges, or oxidation states. Rhodium exists in the 0 state (elemental), +2, +3, and +4. Palladium exists in the 0 state, -1, and +1.