Which is the smallest portion of a substance that retains the properties of an element?
A) atom
B) compound
C) ion
D) molecule
E) mixture
Correct Answer:
Verified
Q2: The atomic number refers to the
A) mass
Q2: An element's mass number is equal to
Q4: The time it takes for half of
Q8: Isotopes
A) are identical in mass number to
Q9: Which element does not contain a neutron
Q10: The nucleus of an atom contains _.
Q10: Which two subatomic particles are almost always
Q11: All atoms of an element have the
Q11: Radioisotopes
A) are unstable and emit energy and
Q12: The neutral subatomic particle is (are) the
A)
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