------- are nuclei with the same atomic number Z but different mass number A.
Isotopes
The Stable light nuclei contain--------.
almost equal number of protons and neutrons
The tenth value layer reduces the transmitted gamma intensity to ------ of the original intensity.
one tenth
Rutherford was successful in bombarding nitrogen with alpha particles and obtaining an oxygen nucleus and a/an -------.
proton
Nuclear density depends on volume of a nucleus.
False
--------- are highly penetrating and require thicker sheets of higher atomic number materials to reduce the intensity.
gamma rays
Which interaction is dominant for high-energy gamma rays? A) Photoelectric effect B) Compton scattering C) Pair production D) Alpha emission
C
The given gold atom has ---------- neutrons.
A sheet of ------- is need to stop betas.
aluminum or plastic
Radiation from cobalt 60 (27 Co60) are used to treat--------.
cancer
Alpha particles are composed of ------- .
two protons and two neutrons
--------- are the lightest particles in an atom and they orbit the nucleus.
Electrons
Binding energy per nucleon is maximum for nuclei with: A) 𝐴 ≈ 1 B) 𝐴 ≈ 60 C) 𝐴 ≈ 100 D) 𝐴 ≈ 200
B
The binding energy per nucleon curve shows that fusion is energetically favorable for: A) Light nuclei B) Heavy nuclei C) Mid-mass nuclei D) All nuclei equally
A
Radoactiveisotopes with ------------ half-lives are used in nuclear medicine.
short
Reducing half of the distance, increases the exposure by a factor of -----.
four
A nucleus is made up of --------and ---------.
protons and neutrons
Gamma rays have: A) Positive charge B) Negative charge C) Zero charge and are electromagnetic waves D) Large mass
C
Which radiation has the highest ionizing power? A) Alpha B) Beta C) Gamma D) Neutron
A
Nuclear charge is -------.
+Ze
The nucleus has -------- charge(s).
positive
Which statement is true about mirror nuclei? A) They have the same neutron number B) They are a type of isotope C) They have the same mass number but protons and neutrons interchanged D) They have different mass numbers but same proton numb
C
The given nuclides are---------.
isotones
The shell model of the nucleus is analogous to: A) Planetary model of the atom B) Liquid drop model C) Free electron gas model D) Rutherford’s gold foil experiment
A
Geiger counter is used for --------- measurement.
alpha, beta, and gamma