Radioactive isotopes are biological tools that are often used to
A) measure the size of fossils.
B) detect brain tumors and other important medical technologies.
C) increase the pH of blood.
D) build up a store of calcium in a cell.
Correct Answer:
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Q12: For an atom to achieve maximum stability
Q13: The atomic number of an atom is
Q14: Free radicals are considered dangerous because they
A)
Q15: Scientists recommend a diet rich in antioxidants
Q16: Free radicals contain unpaired electrons in their
Q18: Carbon-14 is often used for carbon dating,
Q19: Atoms or molecules that have gained or
Q20: The formation of ions involves the
A) sharing
Q21: A single covalent chemical bond represents the
Q22: The element carbon has atomic number 6.
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