Radioactivity

alpha particle
alpha particle
Particle radiating from the nucleus of some atoms. Identical to a helium nucleus.

beta particle
beta particle
Negative particle identical to an electron but radiating from a decaying nucleus.

gamma ray
gamma ray
High-intensity bundle of energy being emitted from some decaying nuclei.

disintegrate
disintegrate
Radioactive elements are radioactive because they have nuclei that _________, or fly apart.

nuclei
nuclei
The _____ are unstable and cannot stick together indefinitely in the combination in which they form naturally.

beta particles
beta particles
These are sharply bent to the north pole.

alpha particles
alpha particles
These are slightly bent toward the south pole.

gamma particles
gamma particles
These are not affected by the magnet.

phosphorescents
phosphorescents
Substances that will glow in the dark after being exposed to sunlight.

radioactivity
radioactivity
High-energy subatomic particles, disintegration of the nucleus, and unstable atoms.

The Wilson Cloud Chamber
This is used to study direction, speed, and distance of radioactivity.

Geiger Counter
Geiger Counter
This is used to measure radioactive intensity.