What happens to the atoms of two metals when they create an alloy?
930459
Pure copper has a certain crystal structure as does pure tin.  Bronze will have a different crystal structure, the exact form of which will depend on the ratio of copper and tin.  (I am treating this as a general scenario, there is a chance that the crystal structure of copper and tin takes the same form - but this would be coincidental; and by chance/coincidence I don't mean theory doesn't define them - i just don't know crystal theory all that well)
384017
Allies are friends.\n\nDo you mean alloys?
868490
assuming you know basic chemistry:\nall metals are cations, right? that means they have + electrons and will bond with non metals easily to form salts. NaCl for example, sodium being the metal, chlorine being the nonmetal.\n\nwell what happens with metal solids and aloys is this: all those extra "valence" electrons floating around their full largest P full shell (you know, 1s2, 2s2, 3p6 and so on..) create a system of delocalized electrons which allow the metals to bond together. since this free system of electrons exists all around the metals that explains why electrons are able to pass through solid metals so easily. (conductivity). the system also give various metals and alloys the ability to be very strong, or rust proof, etc.
1081361
alloy is made of steel and iron....and maybe iron or aluminium can be mixed with lead =)
193226
All atoms do this. The Noble gasses have the most stable electron configurations because they fill/do not have "open shells".\n\nFor example, Calcium's nearest noble gas is behind it, so it will LOOSE two electrons, since losing two is easier than gaining 6 to act like the next noble gas ahead of it, that's why you see Calcium as a 2+ ion. (Ca2+). Iodine, on the other hand needs to gain one electron (instead of losing 7) to be like it's nearest noble gas, so you get the ion of I-. For a metal like silver, it just has one "valance" electron, so you'll see silver as Ag+. Copper has two extra : Cu2+, Iron typically has 3 valance electrons so it make Fe3+
1131804
You have the potential for galvanic corrosion.  Essentially, two metals at different potentials share electrons and one metal (the one with the higher potential) will start to erode and "plate" the other metal.\n\nTypically, using some sort of material that is a non-conductor (ceramics, rubber, etc) between the two or passivating the metal surfaces or coating the metal surfaces (prime and paint per ANSI standards) are your best options to prevent this.
181969
It loses electrons, so it gets a higher oxidation state. An example would be iron going to rust (Fe(s) --> Fe+3).
84628
the study of metals. their characteristics, and behaviours, etc.
783753
The atoms increase in size as you move down the group, because each atom has an additional energy level or shell that contains the valence electron.\n\nWhen atom of group one metals form ions, they lose the valence electron, which causes them to decrease in size.\n\nThe smallest ion will be at the top of the column, since it starts out as the smallest atom,  and the largest ion will be at the bottom.
778725
Consider one cube of the lattice.  there will be one atom on each corner.\n\nWith BCC there will be one atom in the centre of the cube.\nWith FCC there is one atom in the centre of each face of the cube - a dice with one spot on each face.\nIt's a very long time since I did this, but I think steel is BCC at normal temperatures and chnges to FCC on heating.
1080413
Evaporation of water: water turns into steam or water vapor. It's still water (H2O). Same molecule, same chemistry...just different state. So it's a physical change.\n\nRusting of iron: Iron combines with oxygen in the air to turn to rust. Rust is a different compound from pure iron. So it's a chemical change. The reaction is iron + oxygen -> rust, or 4 Fe + 3 O2 -> 2 Fe2O3.\n\nCombustion of hydrogen: Hydrogen burns with oxygen in the air to turn to water. Hydrogen and water are not the same, so it's a chemical change.\n\nTarnishing of silver: This is like rusting, so silver combines with oxygen to form a silver oxide. This is again a chemical change. (People who said it's physical probably don't know what tarnishing is.)\n\nSo anything that involves atoms or molecules combining (or splitting) and forming new atoms or molecules is a chemical change. Anything that keeps the same atoms and molecules, just in a different form, is a physical change.
712812
1.   Ag + KNO3 --> AgNO3 + K\n      single replacement means that a single element breaks a compound apart and joins with part of it--but which part--the positive or negative part?  It depends on what the single element is.  If it's a metal (#1 above), it will join with the negative part of the compound.  If it's a nonmetal (# 4 below), it will join with the positive part of the compound.\n4.  Cl2 + 2 KI --> 2 KCl + I2\nI'll leave you to have fun with the rest!
106147
It is just from the way that the elements are fused together to form the compound. It's the same as any other metal.
816237
I do not think that atoms will fly over the gap between a piece of gold and and old lead pipe.\n\nHowever, gold and lead readily form a wide range of alloy compositions. Lead has a high affinity for gold and can be used as a collector for gold in pyrometallurgical processes. The lead can be subsequently separated by volatilization.
8701
You need to look at a Periodic Table. The farther to the left of the table an element is, the more metallic it is.
482317
Atomic wt of Al is 13,Cu is 29,Zn is 30 and Fe is 26.So less atomic wt,Al contains more number of atoms in 50gm
781553
a typical metalic atom takes a positive charge when it becomes an ion.  that means that it loses its valence electrons.  that means the radius is smaller in the ion than in the atom.