what is the most quenching element in the periodic table?
359503
can u specify what exactly u mean by quenching???
1012358
Osmium is densest followed by Irridium\nOs\nOsmium is the densest element known and the hardest of all platinum\ngroup metals (PGMs). It is 10 times harder than platinum itself.\nOsmium also has a higher melting point than the other PGMs.\nP r o p e r t i e s\nElectrical conductivity 0.109 106 cm-1 Ohm-1\nDensity 22.61 g/cc\nHardness (Brinell value) 3920 MN m-2\nMelting point 3050 ºC\nRarity 1x10-4 ppm in lithosphere\nAtomic number 76\nAtomic weight 190.23\nElectrical resistivity 8.12 microhm.cm at 0°C\nThermal conductivity 87 watts/metre/°C\n\nHeaviest element I think is Francium\nFrancium is a chemical element in the periodic table that has the symbol Fr and atomic number 87. This is a highly radioactive alkali metal that is found in uranium and thorium ores. \nThis element, which was named for France, was discovered in 1939 by Marguerite Perey of the Curie Institute in Paris. Francium is the heaviest alkali metal and occurs as a result of actinium's alpha decay and can be artificially made by bombarding thorium with protons. \n\nEven though it naturally occurs in uranium minerals, it has been estimated that there might be less than 30 grams of francium in the crust of the earth at any one time. It is the most unstable element among the first 101 and has the highest equivalent weight of any element. \n\nThere are 41 known isotopes of francium. With a 22 minute half life, the longest lived isotope of this element is 223Fr which is a daughter isotope of 227At and is the only isotope of francium that occurs naturally. All known isotopes of francium are highly unstable, therefore knowledge of the properties of this element only comes from radiochemical procedures. \n\nA small number of pictures of francium have been taken but only of at the most 200,000 atoms at a time. The pictures were taken by trapping the atoms and using a special fluorescent imaging camera.
714497
Mercury and Bromine are the only liquids in the Periodic table. Francium, cesium, gallium, and rubidium are four elements that melt at temperatures slightly higher than room temperature.
343761
This is a homework question & better not be one of my students! LOL\n\nThe answer is atom.\n\nClassic textbook question. For those of you who thought the question was confusing, take it up w/ the authors of high school textbooks. I will gladly back you up on it. LOL\n\n:)
44826
Copper is #29 on the period table (yes, 4th period), but notice it's average atomic mass is 63.55.  Since electrons weight practically nothing, that means the weight of the protons and neutrons is 63.55.  Since it is #29, it has 29 protons by definition.  So on average it has 63.55 - 29 = 34.55 neutrons.\n\nRemember that though an element has roughly the same number of neutrons as protons, each atom can have a different number of neutrons.  These are called "isotopes".  But on average, copper has 34.55, according to the periodic table I've cited below.
888694
There are a few ways to approach this problem.\n\nFirst, on the left side of the periodic table, most elements are cationic in nature--that is, they like to form a positively charged ion. Elements on the right side of the periodic table tend to be anionic, or negavitely charged.\n\nSecondly, elements on the left side of the periodic table are predominantly metals. Those on the right side of the periodic table are mainly non-metals.\n\nAnother significant difference between the left and right sides of the periodic table is the atomic radii of the elements. Elements to the right side of the periodic table are larger in radius than the elements to the left side of the periodic table.\n\nFinally, elements on the right side of the periodic table are usually (although not always) more electronegative than those found on the left side of the periodic table.\n\nI hope this is enough information to help you with your problem. Good luck!
879268
Zinc is by far the best element. I also like plutonium.  It's just fun to say. "Plutonium."
1007216
Mercury, also called quicksilver, is a chemical element in the periodic table that has the symbol Hg (from the Latinized Greek hydrargyrum, for watery [or liquid] silver) and atomic number 80. A heavy, silvery transition metal, mercury is one of five elements that are liquid at or near standard room temperature (the others are the metals caesium, francium, and gallium, and the nonmetal bromine). Mercury is used in dental amalgam as well as thermometers, barometers and other scientific apparatus, although the use of mercury in thermometers has been largely phased out in clinical and scientific environments (in favor of alcohol-filled, digital or thermistor-based replacements) due to concerns about the element's toxicity. Mercury is mostly obtained by reduction from the mineral cinnabar.
763730
If you're in the US, 1 is true, otherwise not, eg in the UK.\nTransition metals are the most dense.\nFluorine, 1s2, 2s2, 2p5 is the most reactive halogen.\nFluoride ion is 1s2, 2s2, 2p6.
857379
Nitrogen triiodide is a feisty one:\n\nhttp://en.wikipedia.org/wiki/Nitrogen_triiodide
728160
1. C, 2. Cl, 3. Se. The closer the atom is to Fluorine on the Periodic table (excluding noble gases), the stronger the electron affinity. Fluorine is the strongest.
200007
The previous poster is right:  Gold is the most ductile metal.  "Since the cohesive forces are strong and the atoms do not become widely separated from each other during their rearrangement, the metal holds together while its shape is being changed."
748503
s p d f blocks tell which set of orbitals are the last to fill for those elements.\n\n+ or - depending on whether it will lose or gain an e-\n\ncations are smaller than atoms b/c they lose e-\nanions are larger than atoms b/c they gain e-\n\neach successive ionization energy gets higher becasue the #protons is more and more unbalanced by # e-\n\nhalogens have 7 valence e- and noble gases have 8.  by gaining one e- the halogens now have the e- configuration of a noble gas and are more stable.  gain 1 e- = 1- charge
1039103
It is the most chemically active nonmetallic element and is the most electronegative of all the elements. Fluorine reacts with most inorganic and organic compounds
68791
Reactivity in goup 1 increses down the group from Lithium to Sodium to Potassium. Therefore, Sodium would the closest. They are all group 1 metals, just in different periods. All have one vacant electron which makes them very reactive.
827237
Hydrogen\nOxygen\nCarbon\nNitrogen\nPhosphorus\nSulphur
452881
False, because the binding energy increases steeply till iron and again reduces. So I would require enormous accelerators to transmute the element with Z>20.