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Introduction to Nuclear Engineering > Atomic and Nuclear Physics > Flashcards

Atomic and Nuclear Physics Flashcards

1
Q

Name the five most important Fundamental Particles in Nuclear Engineering?

A

Electron, Proton, Neutron, Neutrino, Photon

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2
Q

What is the rest mass of an electron?

A

9.1x10^(-28)g

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3
Q

What is the mass of a Proton?

A

1.67x10^(-24) but slightly less than a Neutron

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4
Q

What is the mass of a Neutron?

A

1.67x10^(-24) but slightly more than a Proton

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5
Q

What is the mass of a Photon?

A

Zero

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6
Q

What is the mass and charge of a Neutrino?

A

Zero and zero.

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7
Q

What is Rest Mass?

A

The mass of a particle with zero speed relative to the observer. Einstein showed that the mass is a function of speed relative to the observer, so it must be technically be specified

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8
Q

What is Electron Annihilation?

A

When two electrons of opposite charge collide and create a photon.

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9
Q

What is Annihilation Radiation?

A

The photons that are created during electron annihilation

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10
Q

Are neutrons stable?

A

No, unless within a nucleus. Free neutrons decay into a proton releasing a negative electron and an antineutrino.

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11
Q

What is the speed of light?

A

c = 3x10^(10)

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12
Q

What is a Nucleon?

A

A particle found in the nucleus

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13
Q

What is a particles atomic number

A

The number of protons in the nucleus

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14
Q

What is a particles atomic mass?

A

The sum of the number of neutrons and protons

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15
Q

What is an isotope?

A

A version of an element with a different number of neutrons

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16
Q

What can be determined from a nuclide symbol?

A

Mass number = top left
Electric charge = top right
Atomic number = bottom left
Average atomic weight = bottom

17
Q

What is the atomic weight of an atom?

A

The mass of the atom relative to the mass of one twelth of a C-12 atom

M_a = ma/(mcarbon/12)

18
Q

What is a mole of a substance?

A

The gram atomic weight = 1 mole

19
Q

What is an atoms Gram Atomic Weight?

A

The weight equal to the N grams

Where N is the atomic weight.

20
Q

What is Avogadro’s number?

A

0.602 x 10^(-23). It is defined as the number of atoms in one mole of a substance.

21
Q

What is an atomic mass unit (amu)?

A

1.66 x 10^(-24) One twelfth the mass of a C-12 atom.

22
Q

What is the average radius of an atom?

A

10^(-10)

23
Q

What is the average radius of a nucleus?

A

10^(-14)

24
Q

What is the equation for estimating the radius of a nucleus?

A

R = 1.25 x 10^(-15) x A^(1/3)

Where A is the atomic mass number

25
Q

What is the liquid drop model of the nucleus?

A

The model in which the nucleus is describe as a liquid of protons and neutrons held together by nuclear forces in the same way water molecules are held together to from droplets.

Introduction to Nuclear Engineering (1 decks)

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