Quiz 15
The half-life of carbon 14 is 5730 years. If a 1-gram sample of old carbon is 1/8 as radioactive as 1-gram of a current sample, then the age of the old sample is about
17,200 years.
An atom with an imbalance of electrons to protons is
an ion.
Both X-rays and gamma rays are emitted from
different parts of the atom.
If carbon were used as nuclear fuel, it would be best
fused
The energy release in both fission and fusion is mainly in the form of
kinetic energy of fragments.
Compared to protons, the reason neutrons are effective nuclear bullets in nuclear reactions is that a neutron has
none of these
The half-life of an isotope is one day. At the end of two days the amount that remains is
one-quarter.
A nucleon has more potential energy with respect to a nucleus when it is
outside the nucleus.
Fusing two helium nuclei yields a net
release of energy.
An element emits 1 alpha particle, 1 positron, and 3 beta particles. Its atomic number
stays the same.