Question

beta particles penetrate tissue up to​

Answer 1

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β-Rays are low-energy electrons that penetrate tissue to 3 to 4mm. Therefore they are used to treat superficial lesions only.

Answer 2

Answer: a centimeter

Explanation: beta particles are electrons and typically penetrate into the tissue only a centimeter like 3mm to 4mm . their limited range means that they can damage internal organs only when ingested or inhaled but they can be an external hazard to exposed skin if they are present in sufficient concerntrations.