Why is nuclear waste enclosed in lead and cement casks and buried deep under ground?
the cement makes the nuclear material inert.
the lead, cement and deep earth cover act as radiation shields.
the cement reacts with the waste to initiate the nuclear process.
the cement takes on the properties of the fuel, creating more fuel.

The nuclear waste was enclosed in lead and cement casks and buried deep under ground because the lead, cement and deep earth cover act as radiation shields.

Option B

Explanation:

Nuclear waste releases radiation as the radioactive source will not be disintegrating completely even after its usage was ended. As the half life time of any radioactive source is very high, complete disintegration of radioactive sources will take time to decay fully.

So, we should use shielding materials through which the intensity of the radiations will not be able to penetrate to affect the human life. As it is known that the three types of radiations like alpha, beta and gamma can be stopped by varying the shielding materials.

So, a nuclear waste is generally casketed in lead and cement tanks and buried deep under ground so that the radiations will not be able to penetrate this much distance and affect human life.

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

bcde is the incorrect answer it is a