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A nucleus is made up of --------and ---------.
protons and neutrons
The nucleus has -------- charge(s).
positive
--------- are the lightest particles in an atom and they orbit the nucleus.
Electrons
------- are nuclei with the same atomic number Z but different mass number A.
Isotopes
The given gold atom has ---------- neutrons.
The given nuclides are---------.
isotones
Radiation from cobalt 60 (27 Co60) are used to treat--------.
cancer
Alpha particles are composed of ------- .
two protons and two neutrons
Reducing half of the distance, increases the exposure by a factor of -----.
four
Rutherford was successful in bombarding nitrogen with alpha particles and obtaining an oxygen nucleus and a/an -------.
proton
Radoactiveisotopes with ------------ half-lives are used in nuclear medicine.
short
--------- are highly penetrating and require thicker sheets of higher atomic number materials to reduce the intensity.
gamma rays
A sheet of ------- is need to stop betas.
aluminum or plastic
Nuclear charge is -------.
+Ze
Nuclear density depends on volume of a nucleus.
False
The Stable light nuclei contain--------.
almost equal number of protons and neutrons
