Use the drop-down menus to answer the questions about fronts and weather maps. Cold fronts appear on weather maps in areas of .
Warm fronts appear on weather maps in areas of .

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