RADIOACTIVITY Flashcards

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1
Q

The reach stability, the nucleus spontaneously emits particles and energy and transforms itself to another atom.

A

Radioactive disintegration or Radioactive decay

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2
Q

Atoms involved in radioactivity

A

Radionuclide

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3
Q

Any nuclear arrangement or the one that was not radioactive

A

Nuclide

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4
Q

The emission of the particle and energy to reach stability

A

Radioactivity

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5
Q

What are the sources of naturally occurring radioisotopes?

A
  1. Some originated at the time of the Earth’s formation and are still decaying slowly.
    Ex. Uranium - Radium - Radon
  2. Cosmic Radiation
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6
Q

This way of reaching stability or radioactivity involves an electrons that is created in the nucleus is ejected from the nucleus with considerable kinetic energy and escapes from the atom.

A

Beta emission

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7
Q

What happens to ¹³¹ 53 I when it decay to Xenon through beta emission?

A

¹³¹ 54 Xenon

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8
Q

TRUE OR FALSE:
Alpha emission is a nuclear transformation that results in the changing of an atom from one type of element to another

A

TRUE

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9
Q

What is more violent? Alpha emission or beta emission?

A

Alpha emission

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10
Q

An alpha particle consist of how many protons and neutrons?

A

Two protons and two neutrons

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11
Q

When an radionuclide emits particle through alpha emission how much it emits?

A

Two units of positive charge and 4 units of mass

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12
Q

Why does alpha emission is also important?

A

It makes the resulting atom not only chemically different but is also lighter by 4 amu

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13
Q

TRUE OR FALSE:
Radioactive decay results in emission of alpha particles, beta particles and usually gamma emission

A

TRUE

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14
Q

Why does beta emission occurs much more frequently than alpha emission?

A

Because only heavy radioisotopes are capable of alpha emission.

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15
Q

1 Bq is equal to?

A

Disintegration of 1 atom each second

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16
Q

Is the tome required for a quantity of radioactivity to be reduced to one- half its original value.

A

Half-life of a radioisotope