<span>The elements that are found in a high proportion in Earth's crust are oxygen, aluminium, iron, calcium, potassium, sodium, and magnesium. But for your Option, I think it is B) Oxygen and Silicon. This is because Oxygen makes 46.6% while Silicon makes 27.7% of the Earth crust.</span>
That would be the sun. Hope this helps.
All isotopes of hydrogen will always contain one proton, as a change in the amount of protons will change the substance. Assuming all isotopes aren’t ions and therefore don’t have a charge, then each of these isotopes has one electron. The only difference between them is the amount of neutrons to account for the different atomic masses.
H1
one proton
one electron
zero neutrons
H2
one proton
one electron
one neutron
H3
one proton
one electron
two neutron
<span>Many of the sensory and motor functions are controlled by the central nervous system and the brain. An example of this would be grabbing a hot pot from the stove. Your brain sends a signal to your hand to tell it to grab the pot. When you grab it your sensory nerves detect that the pot is hot and is burning your hand. The signal it sends back to the brain is one that there is pain and to release the pot.</span>
Circulation is your blood flow, well in my words. Like for example "I'm losing circulation in my arm." They are having their blood flow slow down or even stopped. It doesn't always have to be blood, it can be any fluid
