What happens when hydrogen reacts with a nonmetal element?
920363
it usually creates an acid  like HCl, HF, H2SO4
255642
In the case of metals what happens is that the protons "steal" the electrons of the metal to evolve a H2, or hydrogen gas, in doing so, the metal for example Fe, turns to Fe++ which will dissolve, if the acid used is HCL then you'll get as products H2  and Iron Chloride, if the acid is sulfuric, you'll get H2 and Iron Sulfate. This is completely electrochemical, whereas when an acid attacks  cement is just chemical, and what evolves is carbon dioxide, with skin, I'm not so sure.
570402
Nothing...unless you light a match, then...BOOM!  In the case of Oxygen and Hydrogen, you'll get pure water afterwards...that should put out the fire you just started :)\n(Not really)
669191
There would be no liquid nonmetallic element!!
822799
First three answers are not correct.  The answer, for normal hydrogen and helium, is four.  Two of the protons will convert to neutrons, with the emission of positrons and neutrinos.  The positrons will annihilate with two of the original hydrogen electrons, each throwing a pair of 511 kev gamma rays.  The remaining two electrons will tie up with the helium.  This is the reaction that powers the sun.
253297
Probably nothing since Arsenic is more electronegative than Mercury therefore no metathesis reaction will occur
481911
H2, or hydrogen gas.\n\nFor example, take magnesium metal and hydrochloric acid.\n\nMg + 2HCl -> H2 + MgCl2\n\nThis is a displacement reaction, in which a free element (Mg) breaks the bond between a compound (HCl) and then bonds to the ion with the opposite charge (Cl-) forming a new compound (MgCl2).  The ion left over (H+) loses its charge and becomes a pure element (H2).
588293
When an acid reacts with an alkali (base), neutralisation occurs as the pH of the mixture becomes neutral, pH=7. (Acidic: pH < 7, Basic: pH > 7).\n\nSo an example would be to react sulphuric acid with sodium hydroxide to form sodium sulphate (salt) and water.\n2NaOH + H2SO4 ---> Na2SO4 + 2H20\n\nAn ELEMENT that would neutralise sulphuric acid (i.e. make its pH 7) could be any metal.\n\ne.g. Mg + H2SO4 ---> MgSO4 + H2\n\nBut this is not called a neutralisation reaction.
900859
If the metal not in the compound is higher on the activity series than the metal in the compound then a reaction will occur and the metals will switch spots. If the metal not in the compound isn't higher on the activity series than the metal in the compound then no reaction will take place. You got to be joking if you think I'm going to be doing 20 problems for you. The only way to learn these is to do them on your own. Just so you know in #6 a reaction will not occur.\n\nHere is an activity series:\nhttp://en.wikipedia.org/wiki/Reactivity_series\n\nREACH doesn't know how to do these, don't listen to his answer.
286410
yes, it will explode.  the reaction\n\n2K + 2H2O -> 2KOH + H2\n\nis extremely exothermic and can get very hot.  hot enough, in fact, to ignite the hydrogen, which in an oxygen atmosphere (like air) will explode.  for this reason potassium metal is always stored under oil or kerosene that will not mix with water.\n\nit is essentially the same reaction as the well-known sodium metal in water; lithium, sodium and potassium are in the same group of the periodic table and therefore have similar chemistry.\n\nhere are some pictures of potassium and water reacting, about halfway down the page:\nhttp://www-chem.ucdavis.edu/chemclub/Photos/pday.htm\n\nnote that was probably a small amount of potassium; a larger amount would probably cause a pretty spectacular kaboom.
643847
1. Sodium will combine with Iodine, but Iodine never has a -3 charge. That would involving adding electrons to the 6st orbital, which would be considerably less stable than adding 1 electron to fill the 5p orbitals.\n\nSodium also doesn't form a +2 charge.\n\nBased on your data, it would be:\n\n3Na^+2 + 2I^-3 = Na3I2 \n\nI think it's:\n\nNa+ + I- ---> NaI or 2Na + I2 (solid) ---> 2NaI \n\nionic\n\n\n2. Protons will activately react with hydride donors to give hydrogen gas. That's why Lithium aluminium hydride is so reactive to water ... it considers the water's hydrogen atoms as a source for protons.\n\nH+ + H-1 ---> H2   covalent and non-polar.\n\n3.\nC^+4 + 20^-2 ---> CO2\n\nCovalent and non-polar
607735
If heat has been added to an element, it may make a chemical reaction.  If some object's physical properties due to heat or cooling, a chemical reaction may have occurred.  For example, a fire burning wood creates a chemical reaction in the wood.
800284
a alkali will form a salt\na acid will not react\na metal will form a metalic sulphate and liberate hydrogen\n1)NAOH +H2SO4=NA2SO4+H20\n2)HCL +H2SO4=NO REACTION\n3)Zn+H2SO4=ZnSO4+H2
441550
The nonmetals are halogens, noble gases and the following elements in order of atomic number (nonmetals as chemical series):\n\nhydrogen (H) \ncarbon (C) \nnitrogen (N) \noxygen (O) \nphosphorus (P) \nsulfur (S) \nselenium (Se) \n\nhere's an example:\n\nhttp://en.wikipedia.org/wiki/Periodic_table_%28metals_and_non-metals%29
904375
if the atomic number changes, it becomes a different element\n\neach atomic number corresponds to a different element on the periodic table\n\nif hydrogen gains a proton, its atomic number goes up by one and it becomes helium
590355
Magnesium chloride (MgCl2) and hydrogen (H2) is the gas released in the reaction.
367193
Draino is essential NaOH add that to aluminum and you will get NaOH + Al --> Al(OH)3 + Na2O + H2. So I guess hydrogen gas.