D) basic ions contain some H+ ions
Answer:
Humans started to use pesticides dating back to before 2000 BC.
Hope this helps ^-^
Explanation:
Im no sure what it is i just love helping little boys out. at this age it gives me a thrill.
Bohr changed the model of the atom by proposing that electrons travelled in circular orbits with specific energy levels.
the answer is "There is an outside energy source." in voltaic cells, there is not need of an external source of energy because they involve spontaneous reactions.
in both types of cells, the electrons move from anode to cathode, the anode is where oxidation takes place and cathode for reduction (an ox, red cat). also both have two half reactions.
