What is copper's chemical family?
486351
Cu.\nIt is a transition metal with ions of Cu+ and Cu2+.
810145
depends what the magnesium is for. If this is for a chemical reaction, it's because copper is less reactive than magnesium (it's lower on the activity series list).
48646
CuI2 Copper (II) iodide\nSF6 sulfur hexafluoride\nNaOCl Sodium hypochlorite\nPb3(PO4)2 lead (II) phosphate\nHClO Hypochlorous acid\n\nChlorine triflouride  ClF3\nChromiumIII carbonate  Cr2(CO3)3\nPotassium Chlorate KCLO3\nSodium peroxide Na2O2 \nMercuryI chloride HgCl\n\nThanks You're welcome
927770
1. NaCN\n2. NO2\n3. CuCl2\n4. NaC2H3O2 \n5. F2\n6. bonding involves transfer of electrons between atoms
671681
You are looking for element #29 - Copper (Cu).
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.
863889
Copper is used as a conductor and as a easily maliable (formable) metal.  It is also naturally anti-bacterial.
1053722
Here's are a few:\nhttp://www.science-house.org/learn/CountertopChem/exp25.html\nhttp://www.chymist.com/copper%20silver%20gold%20expl.pdf\nhttp://chemlearn.chem.indiana.edu/demos/15-7%20TheGold1.htm
1086836
Zinc is a much more reactive metal than Copper.  Zinc is much higher on the activity series than Copper.\n\nWhen Zinc metal is added to a Copper +2 solution, the Zinc will displace the Copper in solution, precipiating out Copper metal while Zinc ions go into solution.\n\nZn (s) + Cu+2 (aq) --> Zn+2 (aq) + Cu (s)\n\nSince Zinc (II) Sulfate is soluble in water, the Sulfate (SO4-2) ion is a spectator ion in the reaction, it is in solution on both sides of the reaction.
747313
1) Zinc Chloride\n2) Copper (II) Sulphate\n3) there is no such thing as NH4OH, but oh well..\n    Ammonium Hydroxide\n4) Iron (III) Sulphide\n5) Aluminium Phosphate\n6) Lead (II) Nitrate\n7) Sulphur hexafluoride\n8) Sodium Sulphate\n9) Mercury (II) oxide\n10) Potassium Clorate (V)\n11) Tin (II) Choride\n12) Iron (II) hydroxide\n13) Mercury (II) Sulphate\n14) Carbon Dioxide
625286
Cu is more active than Silver or to put it in more technical terms, its reduction potential is higher. Thus this particular reaction is spontaneous i.e. happens on its own. \n\nThe reverse is also possible but only if you supply the energy required which is usually in the form of electricity.
1154066
It is not due to the chemistry of copper or gold.\n\nIt is due to the electronic band structure. The two metals unusually have a band structure that causes them to absorb light at certain frequencies rather than reflecting it.
24810
Cu + 2H2SO4 --> 2H2O + SO2 + CuSO4\nDouble the H2SO4 and the H2O.
432254
* Name: copper\n    * Symbol: Cu\n    * Atomic number: 29\n    * Atomic weight: 63.546 (3) r\n    * CAS Registry ID: 7440-50-8\n      \n      Standard state: solid at 298 K\n      Colour: copper, metallic\n      Classification: Metallic\n\n    * Group number: 11\n    * Group name: Coinage metal\n    * Period number: 4\n    * Block: d-block
404624
Well, Copper always has 29 protons, otherwise it wouldn't be copper. Metallic copper has 29 electrons, because it isn't an ion. Therefore, to have that +2 charge, it must have 27 electrons (29 protons + 27 electrons = +2 charge).
822606
CuSO4 + NH4S = CuS + NH4SO4\n\n1)Write a rough equation without balancing anything. The 2 after copper, which I presume is to be written as copper (II), indicates that copper has a charge of +2. It is a transition metal and can have a differing charge.\n\n2)Because ammonium has a charge of +1 and the sulfate has a charge of -2, there needs to be 2 ammoniums. SAme thing is for the left side. The ammonium is +1 and the sulfide is -2. There needs to be two ammoniums on the left side. \nCuSO4 + 2NH4S = CuS + 2NH4SO4\n\n3) Because there are two sulfides on the left side, there needs to be two sulfides on the right side. \n\nCuSO4 + 2NH4S = 2CuS + 2NH4SO4\n\n4) Now there are two sulfates on the right side, but not on the left. So we place a two in front of copper (II) sulfate.\n\n2CuSO4 + 2NH4S = 2CuS + 2NH4SO4\n\n5) I believe that we are done with balancing so let's check our work.\n\n6) 2 coppers are on the left and right side.\n2 sulfates are on the left and right side.\n2 ammoniums are on the left and right side. \n2 sulfides are on the left and right side.\n\n7) In most cases, not all compounds will have the same number on each side. It's just a coincidence that there are all 2 of each. If you need anymore help, email me ^_^
747280
Because they are a copper alloy.