Exam 10: Nuclear Physics

A scientist named ______________ discovered radioactivity in 1896.

A fusion reaction occurring in the interior of some stars is shown below.Calculate the mass lost,in atomic mass units,and the energy produced,in millions of electron volts.(Recall that 931 MeV is the energy obtained from the conversion of 1 u of mass.) ${ } _ { 2 } ^ { 4 } \mathrm { He } + { } _ { 6 } ^ { 12 } \mathrm { C } \rightarrow { } _ { 8 } ^ { 16 } \mathrm { O }$ 4.00260 u 12.0000 u 15.9949 u

When an unstable W nucleus undergoes gamma decay,the nucleus formed is that of

The average mass of the atoms of an element in naturally occurring samples is called the ______________ mass of the element.

After seven half-lives have elapsed,what fraction of the original amount has changed into another element?

The mass number (A)of a nuclide is equal to the number of ______________ in one of its nuclei.

Any nuclear process that leads ______________ on the "mass defect per nucleon versus mass number" curve will release nuclear energy.

Which of the following has not yet been proved practical?

When an unstable Nickel nucleus undergoes gamma decay,the nucleus formed is that of

Except for ¹H and ³He,all nuclei having fewer ______________ than ______________ are radioactive.

Write the equation for the reaction of a deuteron with a triton to form a neutron and another particle.

The number of nucleons in a nucleus is the same as the number of neutrons plus the number of ______________.

How many nucleons are there in an atom of ${ } _ { 92 } ^ { 235 } \mathrm { U }$ ?

If the activity of a sample of ²³²Th decreases from 1000 cpm to 500 cpm in 60 min,in another 60 min its activity will be

A gas of electrons and protons or other nuclei is called a(n)______________.

What is the symbol for the element whose atoms have 3 protons each?

Write the equation for the beta decay of ${ } _ { 30 } ^ { 69 } \mathrm { Zn }$

Complete the equation,and state what type of decay is occurring. ${ } _ { 53 } ^ { 131 } \mathrm { I } \rightarrow { } _ { 54 } ^ { 131 } \mathrm { Xe } +$ _____________

Complete the equation: ${ } _ { 80 } ^ { 205 } \mathrm { Hg } \rightarrow { } _ { 81 } ^ { 205 } \mathrm { Tl } +$ ______________

The central core of the atom is called the ______________.