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15 Cards in this Set

  • Front
  • Back
In what abiotic chemical forms are these elements often found in nature?
Commonly found as CO2, N2, O2 ( for air)
H2O, PO4 and S for earth
In what chemical form(s) do animals need to obtain these elements.
With the exception of water and oxygen, these are found as organic compounds.
In what chemical form(s) do plants need to obtain these elements?
plants obtain C as CO2.
N as ammonia or nitrate
Phosphorus as phosphates
Sulfur as sulfides or sulfates

Plant find these elements by organic compounds
Can a chemical element be broken done into other chemical forms by a chemical reactions?
No, it'll always have the same amount of protons, neutrons and electrons.
the atomic number of an element?
the number of protons
the mass numberof an element?
the sum of protons and neutrons
the weight in daltons of one atom of an element
proton and neutrons are about 1 dalton and electrons weight is so small it counts as 0 daltons.
what is the formula for photosynthesis?
6 CO2 + 12 H2O =C6H12O6 + 6 H2O
for every 1 mole of oxygen produced, how many moles of CO2 has to be consumed?
One mole of caron dioxide.
which is more soluble to water polar bonds or non-polar bonds?
Polar bonds because the negativity of the element is attracted to the positive charge of the H's.
What is the difference between a polar covalent bond and a non-polar colvalent bond?
a non-polar bond is two elements sharing equally, unlike a polar bond which doesn't share the charges equally.
What is a ionic bond?
This is when two elements bond together because of an attraction of anoins and cations or poisitve and negative charged elements.
What is a hydrogen bond?
the is when a hydrogen atom colvalently bonds to an electronegative atom that is also attracted to another electronegative.
what is the van der waals interaction?
this is when atoms and molecules are so close that it makes it always have a positive or negative charge.
what's the difference between hydrophobic and hydrophilic?
hydrophilic mixes in water and hydrophobic doesn't.