All isotopes are unstable which have proton number greater than
A) 83.
B) 12.
C) 73.
D) 78.
E) 26.
Correct Answer:
Verified
Q6: Ernest Rutherford
A) observed back-scattering from nuclei.
B) proposed
Q7: Compared to the electrostatic force, the nuclear
Q8: The number of protons in a neutral
Q9: An atom's mass number is determined by
Q10: Isotopes of an element have nuclei with
A)
Q12: When an alpha particle is emitted from
Q13: When a neutron is emitted from an
Q14: When a
Q15: Marie & Pierre Curie
A) discovered radioactivity.
B) proposed
Q16: Henri Becquerel
A) proposed the tiny central nucleus
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