Which type of nuclear radiation is stopped by a sheet of paper?

Which type of radiation has the highest ionizing effect?

What is a Beta particle?

Which statement about Gamma radiation is correct?

A Geiger counter near a radioactive source gives a count rate of 180 counts/minute. Background radiation is 30 counts/minute. What is the corrected count rate from the source alone?

Draw the path of Beta particles when they pass between two parallel charged plates (one positive, one negative). Explain your answer.

Explain why Alpha particles are more ionizing than Gamma rays, even though Gamma rays have higher energy.

Describe the nature of Gamma radiation. Include information about its charge, mass, and classification.

Complete the nuclear equation for Alpha decay: ²³⁸₉₂U → ___ + ⁴₂He. State what type of element is formed.

Explain why Beta decay changes one element into another, but Gamma emission does not.

A student places a sheet of aluminium (3 mm thick) between a radioactive source and a detector. The count rate drops from 400 counts/minute to 35 counts/minute. Background radiation is 30 counts/minute. Identify the type of radiation emitted by the source.

State TWO safety precautions when handling radioactive sources in a school laboratory.

A detector records these count rates: No source = 25 counts/min, Source with no absorber = 520 counts/min, Source with paper = 180 counts/min, Source with 3mm aluminium = 35 counts/min. Explain what types of radiation the source emits.

A student investigates the range of Alpha particles in air. Describe TWO sources of uncertainty in this experiment and suggest how to reduce them.

A smoke detector uses Americium-241 (Alpha emitter, half-life 432 years). Explain why Alpha radiation is suitable for this application, and why the long half-life is important.