The atomic mass number of an element is the same as the number of its
A) protons.
B) neutrons.
C) nucleons.
D) none of these
Correct Answer:
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Q7: The half-life of a radioactive substance is
Q8: The sources of X-rays and gamma rays,respectively,are
A)electron
Q9: An atom with an imbalance of electrons
Q10: Different isotopes of an element have different
Q11: A nucleon is either
A)a positron or an
Q15: Both X-rays and gamma rays are emitted
Q16: Once an alpha particle is outside the
Q17: A quark is
A)an elementary particle.
B)a building block
Q27: Generally speaking, the larger a nucleus is,
Q69: Deuterium and tritium are both
A)forms of hydrogen.
B)isotopes
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