Intro Nuclear Chem

Intro Nuclear Chem

Multiple Choice

Nuclear reactions differ from other reactions due to

• breaking multiple bonds releasing energy

• transferring electrons

• sharing electrons

• changing the identity of an atom

Nuclear Reactions

Change the identity of an element

can change the # of

protons

neutrons

or energy state

Multiple Choice

when the potential energy stored in the nucleus is altered in a nuclear reaction

• enormous amounts of energy is produced

• enormous amounts of energy is absorbed

Energy

• Nuclear reactions release ENORMOUS amounts of energy

Multiple Select

Nuclear Reactions (check all that apply)

• Follow the Laws of Conservation

• Break the Laws of Conservation

• Change in mass

• Change in charge

Nuclear Reactions

• transform energy

• transform mass

• cannot create mass or energy

Multiple Choice

What is the atomic number for Ca?

• 20

• 40

• 4s²

• Ca

Multiple Choice

What is the atomic mass for Ca?

• 20

• 40

• 4s²

• Ca

Multiple Choice

This is a common way of writing

• a nuclide

• electrons

• positrons

• beta decay

Nuclide

• Atomic mass- the number of protons and neutrons

• Atomic number- the number of protons

Multiple Choice

unstable nucleus emits radiation and is transformed into the nucleus of one or more other elements, produces daughter atoms

• nuclear decay

• nuclear transmission

Multiple Choice

nucleus reacts with a subatomic particle or another nucleus to form a product nucleus that is more massive than the starting material

• nuclear decay

• nuclear transmission

Nuclear rxn

• Nuclear decay (radiation)- unstable nucleus emits radiation and is transformed into the nucleus of one or more other elements, produces daughter atoms

• Nuclear transmission- nucleus reacts with a subatomic particle or another nucleus to form a product nucleus that is more massive than the starting material

Multiple Choice

Nuclear decay occurs spontaneously

• T

• F

Multiple Choice

Nuclear transmission occurs spontaneously

• T

• F

Types of Nuclear rxns

• Nuclear decay reactions occur spontaneously

• Nuclear transmission reactions are induced

Multiple Select

a positron (check all that apply)

• same mass as a proton

• same mass as an electron

• same charge as a proton

• same charge as an electron

• occurs naturally in the atom

Positrons and Neutrinos

• positrons- same mass as an electron with opposite charge

• neutrino- neutral charge with almost 0 mass

Multiple Choice

What symbol does this represent

⁴₂α

• alpha decay

• beta decay

• positron emission

• gamma emission

Multiple Choice

What does this symbol indicate

⁰₀γ

• gamma emission

• positron emission

• beta decay

• alpha decay

Symbols for radioactive decay

• ⁴₂^{α - alpha decay}

• ⁰_-1β- beta decay

• ⁰₊₁β - positron emission

• ⁰₀γ - gamma decay

Multiple Choice

An atom that possesses too many neutrons is subject to this type of rxn

• alpha decay

• positron emission

• beta decay

• gamma emission

Multiple Choice

An atom that possesses too few neutrons is subject to this type of rxn

• alpha decay

• positron emission

• beta decay

• gamma emission

Radiation

• Alpha decay- Element that have a mass greater than 200, releasing an alpha particle

• Beta decay- Conversion of a neutron to a proton and a high energy electron that is released

• positron emission- Conversion of a proton to a neutron releasing a high energy positron (size of an electron with opposite charge)

gamma radiation

 electromagnetic energy (photon) 

emitted from an excited nucleus

particle moving at the speed of light

highly damaging to organic tissue