What can cause the eruption from a shield volcano to become explosive?

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

Must be negative.substance increases

Radioactive fallout is a result of the fission creation used to ignite the thermonuclear fusion reaction.