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 temperature is constant which makes it the independent variable
Answer:
the particles, molecules, and gas range from smallest to largest in the following order: electron < proton < atom <...
