Humans face a problem because once petroleum reserves begin to run out, there won't be enough fuel to power all the automobiles in the world. which of the following is the best potential long-term solution to this specific problem of energy supply?

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