Neutrons are found in the nucleus. Because their electric neutrality the are lik

Question

Neutrons are found in the nucleus. Because their electric neutrality the are like "cement" facilitating the nuclear stability.

True

False

Gamma Rays consist of low energy photons

True

False

All kinds of radiations (X-Rays, Gamma-Rays, etc.) cause some damage to the living tissue. They are all equally harmful.

True

False

About one-sixth of our annual exposure to radiations comes from nonnatural sources, mainly medical procedures.

True

False

A radiation dosage of 500 REM is already lethal, a person may have a 50% chance of surviving this dose.

True

False

The nucleus consists of several nucleons (basically protons and neutrons) tied together by very strong forces.

True

False

Radioactivity is related to drastic changes that occur in:

outer regions of atoms

the atomic nucleus

atomic electrons

None of the above

Radioactivity was first discovered in Uranium, but later other substances as Thorium, Actinium, and Radium were found. These materials were thoroughly studied by:

Wilhelm Roentgen

Marie and Pierre Curie

Henri Becquerel

None of the above

outer regions of atoms

the atomic nucleus

atomic electrons

None of the above

Explanation / Answer

1. True.

Neutrons are found in the nucleus. They provide nuclear stability.

2. False

Gamma Rays consist of high energy photons.

3. False

Only X-Rays, Gamma-Rays and UV cause some damage to the living tissue. They are also not equally harmful.

4. True.

   One-sixth to the population dose from background radiation which constitutes man-made radiation exposure.

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