Louey Posted June 14, 2004 Share Posted June 14, 2004 I have a task to do and am a bit stuck - and feeling rather thick Somewhere above atomic number 110 there is an island of stability where the atoms of elements are likely to have longer lifetimes. There is as yet an unknown element that has 120 protons and 174 newtrons, it is called utimatum and has the symbol Ul 1. I need to state the atomic number (120?) and give the full symbol for the isotope (is this 294 over 120 Ul?) 2. I have to give the Period and the Group of the periodic table where I would expect to find Ul and explain how I arrived at it (I am stuck here with the group and have it under period 7). 3. I have to name another chemilca elememt in the Periodic table that I would expect it to resemble closely (? do I look at something with the same number of protons and neutrons?) 4. I have to state and give my reasons whether I expect it be a metal, semi-metal or non-metal (? is this given away by the numbers?) 5. Have to give the highest empirical formula of the highest normal oxide and highest fluoride of Ul (and have to explain how I got the formula). Guess this is Ul something 0 and UlF but not sure if I should have any other numbers there. 6. Suppose that the isotope of Ul whose symbol I wrote in 1 above undergoes a succession of 7 a-decay reactions: (a) what isotope would be the final product of these changes? Do I remove 7 lots of something and so many protons and the figures I end up with give me another isotope?? (b) is the final product an ianthanie, actinide, a transition element of a typical element (no idea at the moment! wild guess is an actinide but this is a wild guess). Thanks in advance for any wise words of wisdom. Lou Link to comment Share on other sites More sharing options...
swansont Posted June 14, 2004 Share Posted June 14, 2004 I have a task to do and am a bit stuck - and feeling rather thick Somewhere above atomic number 110 there is an island of stability where the atoms of elements are likely to have longer lifetimes. There is as yet an unknown element that has 120 protons and 174 newtrons' date=' it is called utimatum and has the symbol Ul 1. I need to state the atomic number ([i']120[/i]?) and give the full symbol for the isotope (is this 294 over 120 Ul?) Yes. 6. Suppose that the isotope of Ul whose symbol I wrote in 1 above undergoes a succession of 7 a-decay reactions: (a) what isotope would be the final product of these changes? Do I remove 7 lots of something and so many protons and the figures I end up with give me another isotope?? An alpha is a He-4 nucleus. So the final product will have 14 fewer protons and 14 fewer neutrons. Link to comment Share on other sites More sharing options...
aommaster Posted June 14, 2004 Share Posted June 14, 2004 2. I have to give the Period and the Group of the periodic table where I would expect to find Ul and explain how I arrived at it (I am stuck here with the group and have it under period 7). I'll tell you how to do it. Find the electronic configuration of the element. The nuimber of electrons in its outer shell is the group number. 3. I have to name another chemilca elememt in the Periodic table that I would expect it to resemble closely (? do I look at something with the same number of protons and neutrons?) Look at any element in the same group for this one. 4. I have to state and give my reasons whether I expect it be a metal, semi-metal or non-metal (? is this given away by the numbers?) Elements that lie on the left hand side and middle of the periodic table are all metals. Elements that lie towards the right are all non-metals. For elements that are semi-metal, look at the link: http://helios.augustana.edu/physics/301/periodic-table-fix.jpg Notice that there is a zig zag line that starts at boron, it is dark. Any elements that lie next to that line are semi-metal. Link to comment Share on other sites More sharing options...
Louey Posted June 14, 2004 Author Share Posted June 14, 2004 Brillant, thank you. And thank you for the link, off to have a look Link to comment Share on other sites More sharing options...
Louey Posted June 14, 2004 Author Share Posted June 14, 2004 5. Have to give the highest empirical formula of the highest normal oxide and highest fluoride of Ul (and have to explain how I got the formula). Guess this is Ul something 0 and UlF but not sure if I should have any other numbers there. Nearly there, am I on the right track for this one, have been going over it and no further along! Link to comment Share on other sites More sharing options...
YT2095 Posted June 14, 2004 Share Posted June 14, 2004 so it`s between Tin (Sn) and Antimony (Sb) but the closest next to to Tin? and it`s called "Utimatum" (Ui) ROFLOL, I gather this is a purely hypothetical exercise then? Link to comment Share on other sites More sharing options...
aommaster Posted June 14, 2004 Share Posted June 14, 2004 Brillant, thank you. And thank you for the link, off to have a look Your welcome, glad to be of help Link to comment Share on other sites More sharing options...
Louey Posted June 14, 2004 Author Share Posted June 14, 2004 I've worked it (I think!) to be close to Unh - going by the 14 off of the 120 which gives me 106. Now to figure the electronic config. This keeps me occupied to say the least!!! Link to comment Share on other sites More sharing options...
aommaster Posted June 14, 2004 Share Posted June 14, 2004 lol. I told you it, because I can't work it out I'm only at GCSE level! Link to comment Share on other sites More sharing options...
wolfson Posted June 14, 2004 Share Posted June 14, 2004 106 = (Rn)7s2, 6d4 Link to comment Share on other sites More sharing options...
aommaster Posted June 14, 2004 Share Posted June 14, 2004 wow! Link to comment Share on other sites More sharing options...
YT2095 Posted June 14, 2004 Share Posted June 14, 2004 isn`t Rn just 6p6? Link to comment Share on other sites More sharing options...
wolfson Posted June 14, 2004 Share Posted June 14, 2004 Yer i just used the short version (being lazy). Link to comment Share on other sites More sharing options...
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