Examlex
The best-known compensatory preschool program for children of low-income families in the United States is
Atomic Weapons
Weapons that derive their destructive force from nuclear reactions, either fission or a combination of fission and fusion.
Positron
A positron is a subatomic particle with the same mass as an electron but a positive electric charge.
Beta Particle
A high-energy, high-speed electron or positron emitted by certain types of radioactive nuclei during radioactive decay.
Isotope
Variants of a particular chemical element which differ in neutron number, and consequently in mass, but share the same chemical properties.
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