Uranium is weakly radioactive because all its isotopes are unstable (with half-lives of the 6 naturally known isotopes, uranium-233 to uranium-238, varying between 69 years and 4.5 billion years).
The median annual wage for occupational therapy assistants was $59,010 in May 2016. The median wage is the wage at which half the workers in an occupation earned more than that amount and half earned less. The lowest 10 percent earned less than $39,160, and the highest 10 percent earned more than $80,090.
Occupational therapy assistants need an associateâs degree from an accredited occupational therapy assistant program. In most states, occupational therapy assistants must be licensed. Occupational therapy aides typically have a high school diploma or equivalent.ccupational therapy assistants also must complete at least 16 weeks of fieldwork as part of their education to gain hands-on work experience. Occupational therapy aides typically have a high school diploma or equivalent. They are trained on the job under the supervision of more experienced assistants or aides.