Radioactivity and Radiation Types in Uranium Discovery

In 1895, Beckel discovered that uranium rocks affected photographic paper, marking the first evidence of radioactivity. This led to the identification of three types of radiation: alpha, beta, and gamma. Alpha radiation is easily stopped by air or paper and is heavily charged. Beta radiation is more penetrating, lighter, and negatively charged. Gamma radiation, the most penetrating, is a wave with no charge or mass, unaffected by magnetic fields.

Who discovered that uranium rocks affected photographic paper?

• Henri Becquerel

• Albert Einstein

• Marie Curie

• Isaac Newton

What is the name of the uranium rock that was studied for its radioactive properties?

• Ural Nitrate

• Uranium Tetrafluoride

• Uranium Dioxide

• Uranium Hexafluoride

Which type of radiation is easily stopped by a piece of paper?

• X-ray radiation

• Beta radiation

• Gamma radiation

• Alpha radiation

What charge do alpha particles carry?

• Negative

• Neutral

• Positive

• No charge

Which type of radiation bends to the left in a magnetic field?

• Alpha radiation

• Beta radiation

• Gamma radiation

• Neutron radiation

What is the charge of beta particles?

• Neutral

• No charge

• Negative

• Positive

Which type of radiation is the most penetrating?

• Neutron radiation

• Beta radiation

• Alpha radiation

• Gamma radiation

What is the nature of gamma radiation?

• It is a particle

• It is a wave

• It is a mixture of particles and waves

• It is a solid

Which material can stop gamma radiation?

• Water

• Paper

• Aluminium

• Lead

What is the mass of gamma radiation?

• It has negative mass

• It has mass

• It has variable mass

• It has no mass