A pure substance that cannot be broken down into another substance is known as a(n) ____.
A) proton
B) electron
C) compound
D) element
E) isotope
Correct Answer:
Verified
Q10: Isotopes of an element are different from
Q11: Which statement is true of electron shells?
A)The
Q12: When an atom's outer electron shell is
Q13: Radioisotopes _.
A)are unstable and emit energy and
Q14: If a chlorine atoms has 7 electrons
Q16: Which element is not one of the
Q17: The blending of two or more kinds
Q18: A tracer is a substance with what
Q19: Positron emission tomography (PET)utilizes _ to yield
Q20: What makes water a good solvent?
A)It dissolves
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