Organisms consist mostly of four elements. They are carbon, hydrogen, oxygen, and
A) iron.
B) chlorine.
C) silicon.
D) nitrogen.
E) phosphorous.
Correct Answer:
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Q9: Which element does not contain a neutron
Q10: Which two subatomic particles are almost always
Q11: Radioisotopes
A) are unstable and emit energy and
Q12: The neutral subatomic particle is (are) the
A)
Q13: The negative subatomic particle is (are) the
A)
Q15: A sugar or other molecule in which
Q16: How many natural elements exist on Earth?
A)
Q17: An element that represents less than 0.01
Q18: Transmutation of an element (the change of
Q19: Positron Emission Tomography utilizes _ to yield
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