In acidic solutions you have H+ but in basic solutions you have OH-.
You need know that for to balance the reaction.
Answer:
bromine (Br)
Explanation: Iron enters into a reaction with substances of different classes, and interacts with oxygen, carbon, phosphorus, halogens (bromine, iodine, fluorine and chlorine), and also nitrogen. These are not all the reactions of iron – this metal reacts with many elements.
The answer is c)11 because copper has 11 valence electrons
Scientists often repeat one or more steps several times.
