Questions on the Periodic Table....?
955038
all aelements in the same group have same number of electrons in their outermost orbit. but as you go down the group the number of orbits go on increasing and so there will be change in properties like ionization energy, electron affinity etc.\n\nnoble gases have got 8 electrons in their outermost shell or orbit. as we know that 8 electrons are required to complete octet, they have already a stable octet, so they don't require to loose or gain electrons to become stable as they are already stable, so they are unreactive\n\nthe period in which the element is present represent the number of shell of that element. for eg Mg has atomic number 12 so it will have 3 orbits or shell so it will appear in period III. all elements in same period will have same outermost orbit but number of electrons will go on increasing as their atomic number goes on increasing.\n\ni hope this will help you out
241118
http://images.search.yahoo.com/search/images?p=periodic+table&sm=Yahoo%21+Search&fr=FP-tab-img-t&toggle=1&cop=&ei=UTF-8
958410
1.\nMn(s) + SnCl2(aq) --> MnCl2(aq) + Sn(s)\nCr(s) + 2HBr(aq) --> CrBr2(aq) + H2(g)\nCo(s) + CaBr2(aq) --> N.R\n2Al(s) + 3Ni(NO3)2(aq) --> 2Al(NO3)3(aq) + 3Ni(s)\n\n2.\nMg + 2AgNO3 --> Mg(NO3)2 + 2Ag\nmole of Ag = 3.580 / 108 = 0.033 mole\nmole of AgNO3 = 0.033 mole = 33 mmole\nmolarity of AgNO3 = 33 / 50 = 0.66 M\n\n3.\na.soluble\nb.soluble\nc.soluble\nd.insoluble\ne.soluble\nf.soluble\ng.insoluble in water, soluble in acid\nh.soluble\n\n4.\n3NaOH(aq) + Fe(ClO4)3(aq) --> Fe(OH)3(s) + 3NaClO4(aq)\n3Na+ + 3OH- + Fe3+ + 3ClO4- --> Fe(OH)3 + 3Na+ + 3ClO4-\nFe3+ + 3OH- --> Fe(OH)3\n(NH4)2SO4(aq) + Pb(NO3)2(aq) --> PbSO4(s) + 2NH4NO3(aq)\n2NH4+ + SO42- + Pb2+ + 2NO3- --> PbSO4 + 2NH4+ + 2NO3-\nPb2+ + SO42- --> PbSO4\n\nHope it helps\npeace\nvixklen
754664
Los Alamos national lab has a good periodic table/ elemental factoids.\n\nLanthanum is La.  It is the beginning of the "Lanthanides".
734854
I'm going to cheat a little bit in both cases by just referring back to the nearest noble gas.  That itself may be acceptable for your purposes (it's how most chemists list them because things past that point are usually of no interest)... if you need, I'll pass on the underlying noble gas configuations too.\n\n13:  [Ne] 3s2 3p1\n33:  [Ar] 4s2 3d10 4p3\n\nBasically, the electrons usually fill up the shells just as you see the elements arranged on the periodic table.  Group 1 and 2 (the two columns on the left) are the s shell, and the number of the s shell is indicated by the row number.  Group 13 through 18 (the six columns on the right) are the p shell; its number is also the same as the row number.  The middle stretch are d orbitals, and they're so expensive energetically that the ones on each row are orbitals from one shell down.  That chart is handy for all kinds of things!\n\nHope that helps!
744262
2, since it's in group 2 of the periodic table
307775
go to www.google.com them write periodic table and than go to images and you'll see
864116
1) is false, all the elements in living things can be found in non-living things\n\n2) this more tricky, what are these 4 elements most common in plants? I'm guessing: Hydrogen and Oxygen, (from water) Carbon, and . . .nitrogen???\nall these can be found in animals\nare you sure the question is asking about elements? elements in living things are pretty common to another. Its the compounds (hemoglobin, chlorophyll, etc) that get rather unique\n\ndo a little research, if some one cannot explain how they got the answer to a T/F question, you can't be sure they are just guessing
113340
I will get you started on the exact answers to this, my friend.  But I am not going to do all your work for you.\n\nGo to http://myweb2.search.yahoo.com/search?fr=ks&p=paramagnetic+elements \n\nOnce you pull that up and start reading, it will lead to all the rest fairly directly.\n\nBe sure to groove on each definition to get the exactitude of it -- magnetic, paramagnetic, diamagnetic, etc.\n\nTry to learn something about the electron configurations involved.\n\nAll good things take some work, you will learn better if you do it yourself while taking notes.
116173
The position of the elements in the periodic table gives you clues about the valences of each element. Also, if you remember the formulae for familiar substances (like carbon dioxide, water, sulfur dioxide, hydrochloric acid, etc) that will also give you clues about possible or likely valences. \n\nThe final answer is:\n\nmemorize.
27684
Protons, neutrons, and electrons.
791559
Let's see, this may be a bit difficult to explain, but since no one else has so far, I figured I'd give it a shot.\n\nI don't have a periodic table in front of me, so I'll do my best to explain.  There is a double bond between N and one of the O's because of something called "in-bonds."  You determine the number of "in-bonds," or bonds in between elements by subtracting the number of valence electrons that you have all together from the number that you need for everything to be stable.  In this case, forget about H for the time being, and you have N03.  Each element needs 8 electrons to fill its valence shell right?  Multiply 8 by 4, since there are 4 elements, and you get 32.  However, you only have 24 electrons to go 'round.  The difference is 8, there for you can have a total of 8 electrons, or 4 individual bonds in between the elements.  It doesn't matter which O gets to share the double bond with N, as they are all the same.\n\nThe double bond was used in HNO3 and not NF3 because I believe you had enough electrons to go around, therefore there were no "in-bonds."\n\nI hope this helps to clear up your questions.
137403
the periodic table is great because it ditinguishes the different shells (s, p, d and f) that are filled as you add electrons. eg. He has 2 s electrons (full shell)\nNe has 1s2, 2s2 and 2p6 (full shell).\nIt gets a little more complicated at d electrons (transition metals) but Mendeleev did a great first shot.
961493
You need to know more than just the electron configuration.  There is contraction from left to right on the periodic table, plus additional periodic trends that must be considered.   \n\nEven more importantly, you need to define whether you are looking for the largest element IN ITS NATURAL  STATE (i.e. Cl2, Hg metal, etc) or AS THE ION.   Atomic and ionic radii differ.\n\nMore clarity is needed here.
835475
I think ur referring to the chemical definitions.\n\nIn the periodic table, groups are the vertical columns having similar elements... ie. they have the same valencies leading to similar properties.. Example Group 1: has valency 1.. (Na, K etc)\n\nperiods are horizontal rows having elements with the same number of shells.. ie.. 1st period elements have only one shell (H and He - K shell).. 2nd period elements have 2 shells (K,L) and so on..\n\nLook up wikipedia for more info..
198620
My Chemistry teacher taught me a great story which helped me learn the elements, which groups they were in, which periods, how many electrons they had etc and resulted in me going from a grade F to B. Every kid should learn this.\n\nHorrible Heary Little Begger Boys Catch Newts On Friday Near Naples, Magnificent Albert Sits Planning Some Clever Arrangement Keeping Calm.\n\nOk, looks crazy until you break it down;\n\nH He Li Be B C N O F Ne Na, Mg Al Si P S CL Ar K Ca\n\nThen put it into the table\n\nH\n                   He\nLi Be  B C  N O F  Ne\nNa Mg Al Si P S Cl Ar \nK  Ca\n\nYou will need to line them up because Yahoo has left align, but the trick is the story. Hope this helps
1043428
Yeah - its in the second group of the periodic table therefore the ion will be 2+\n\nSome more information which may aid understanding or may just be useful at some stage \n\nAn atom in group one will have an ion which is +1\nAn atom in group 7 will have an ion which is -1\nAn atom in group 6 will have an ion which is -2\nThey are the general rules for all the ions which you you will probably come across most often