<span>B.by arranging the elements according to atomic number instead of atomic mass</span> awnser is B
Iron has the chemical formula Fe from its Latin name, ferrum. Its atomic number is 26, and its molar mass is 55.845 grams per mole. It has a metallic gray color and is attracted to magnets. Iron is the second most-abundant metal on Earth.
Answer:
two oxygen atoms
There are two oxygen atoms in the reactants and two atoms of oxygen in the product.
Explanation:
