Which of the following is one way to prevent the corrosion of iron?
a. paint exposed iron p21 with protective paint.
b. protect the iron from polluted air.
c. add carbon to the iron.
d. let the iron develop a natural coat of carbonate.

The best way to prevent the corrosion of iron is to paint the exposed iron with protective paint, because that prevents water from rusting the iron.

A.

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom