2Ca(s) + 2H2O(l) -------->Ca(OH)2 (aq) + H2(g)
The letters in brackets represent state symbols
(s)-solid
(l)-liquid
(g)-gas
(aq)-aqueous
the letter before the elements are added to balcne the equation.
Sorry I couldnot write the equation properly.For hydrogen gas(on the right side) the 2 is...