One Roentgen Is Defined as

question 29

Multiple Choice

One roentgen is defined as

• A) the amount of ionizing radiation that will produce 1/3 × 10−⁹ C of electric charge in 1 cm³ of air under standard conditions.
• B) the amount of radiation that deposits 10−² J of energy into 1 kg of absorbing material.
• C) the amount of radiation needed for ionization of an atom.
• D) the amount of radiation needed for dissociation of a molecule.
• E) the amount of radiation that deposits 1 erg of energy in 1 g of air.

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