What is the hardest metal in the periodic table?
346988
Osmium is the hardest, as well as the most dense- Osmium and the closely related iridium are used in the balls of ball-point pens because of their hardness, thus they dont deform under the relatively powerful force generated during writing.\nUranium is not used as a shell because of it's hardness, but because of it's density, which is a more important aspect for penetrating armor.
1005621
I believe that Titanium is currently the strongest metal known to man.
744262
2, since it's in group 2 of the periodic table
739924
try here:http://rds.yahoo.com/_ylt=A0oGkjr5altFbCIATYFXNyoA;_ylu=X3oDMTE2aWNrczNxBGNvbG8DdwRsA1dTMQRwb3MDOARzZWMDc3IEdnRpZANERlg1XzMw/SIG=12odtnv12/EXP=1163705465/**http%3a//www.theodoregray.com/PeriodicTable/Elements/013/index.s7.html
928366
The first answer is, like, SO wrong. Gold is one of the least active metals. Check out the Activity Series of metals (you can Google it). The ones at the top of the list (lithium, calcuim, and barium, I think) are the most reactive. They'd react readily with air (they oxidize, releasing hydrogen gas from the water vapor in the atmosphere, forming an oxide or hydroxide). They'd definitely cause an explosion when reacted with acids. Even sodium metal (not salt, I'm talking pure sodium) will react with acids violently.\n\nAll metals react with acids to some degree. Even gold, the most unreactive metal, dissolves in selenic acid. Silver reacts best with nitric acid to form silver nitrate. The coinage metals (Au, Ag, Cu) are the most unreactive.
980879
You need to look at the radius of the atom, and the number of protons in the nucleus.\n\nGroups I and 2 in the Periodic Table have large atoms, with good screening and low IE values.  The transition metal atoms are smaller, and the outer electrons are therefore harder to remove.
1168378
Hardest substance is Diamond.
205315
Densest Naturally Occuring Mineral\n\nThe mineral Chengdeite - Ir3 Fe\nSpecific Gravity - 19.3 g/cm3 (Gold is 17.65, Platinum is 18.00)\n\nDensest Element - \nIridium - 22.65 g/cm3 \nClosely followed by Osmium - 22.61 g/cm3
360182
Heavy Metal! Just joking. http://www.scienceproject.com/projects/intro/elementary/EX057.asp Go here, they have a lot of information.\n\nhttp://www.science.ca/askascientist/viewquestion.php?qID=1216 And this one. It is clear that aluminum conducts the best heat.
714340
look up the periodic table...duh
239566
no, the densest metal is NOT uranium, it is the heaviest natural element, but it is the the most compacted, and therefore, dense, the densest element is Iridium at 22.5 g/cm3. uranium's density is only 18.95 g/cm3 at 20 C.
20996
Definitley the element, Mercury. With a melting point of -37.89 °F (-38.83 °C)\n\nhttp://en.wikipedia.org/wiki/Mercury_%28element%29
1013566
For common metals, iron is pretty much all you have.  Magnetite is an oxide of iron that is the about the most magnetic metal on earth.\n If you are looking for low weight, rare earth magnets are the way to go, but will cost you accordingly.  Neodymium or Samarium-Cobalt are your best bets there.
882220
pretty sure its a metal.\nhope this helps. :)
5530
Arsenic is the metal, but at temperatures much lower than its melting point (not boiling point).  It sublimes at 614 degrees C and melts under pressure at 817 degrees C.\n\nAlthough Iodine has a metallic luster, it is not a metal.  It sublimes (evaporates) near its \nMelting Point of 114 degrees C.\n\nSee the reference below:
910938
Na+ and K+ (both group 1)\nCa2+ and Mg2+ (both group 2).\nNa+ and Mg2+ have the electron arrangement of neon, and the other two that of argon.\nIonic radius decreases from left to right, and increases top to bottom, so K+ is the largest of all these.\nElectronegativity increases upwards and to the right of the Periodic Table, so Mg has the highest value of these four.
226777
Tungsten is a fairly cheap metal (compared to the precious metals) which is very dense, has one of the highest melting points of all metals, and is resistant to acids (though not as resistant as gold or platinum)