Chapter 29
... • Radioactivity is the result of the decay (disintegration) of unstable nuclei • Three types of radiation can be emitted • 1) Alpha particles: 4He nuclei) • 2) Beta particles: either electrons or positrons (a positron is the antiparticle of the electron, similar to the electron except its charge is ...
... • Radioactivity is the result of the decay (disintegration) of unstable nuclei • Three types of radiation can be emitted • 1) Alpha particles: 4He nuclei) • 2) Beta particles: either electrons or positrons (a positron is the antiparticle of the electron, similar to the electron except its charge is ...
Radioactivity - Mrs. Sjuts` Science Site
... ! Smaller elements neutron to proton ratio is 1:1 to be stable isotopes ! Heavier elements neutron to proton ratio is 3:2 to be stable isotopes ! Nuclei of any isotopes that differ much from thes ...
... ! Smaller elements neutron to proton ratio is 1:1 to be stable isotopes ! Heavier elements neutron to proton ratio is 3:2 to be stable isotopes ! Nuclei of any isotopes that differ much from thes ...
Radioactivity - Miami Beach Senior High School
... Emitting beta particles • A neutron can spontaneously transform into a proton and electron in a nucleus with more neutrons than protons. • The electron is emitted form the nucleus. • This is beta radiation. • The element now increases its atomic number by one, as it has an extra proton. • Thorium-2 ...
... Emitting beta particles • A neutron can spontaneously transform into a proton and electron in a nucleus with more neutrons than protons. • The electron is emitted form the nucleus. • This is beta radiation. • The element now increases its atomic number by one, as it has an extra proton. • Thorium-2 ...
Chapter 29
... • Radioactivity is the result of the decay (disintegration) of unstable nuclei • Three types of radiation can be emitted • 1) Alpha particles: 4He nuclei) • 2) Beta particles: either electrons or positrons (a positron is the antiparticle of the electron, similar to the electron except its charge is ...
... • Radioactivity is the result of the decay (disintegration) of unstable nuclei • Three types of radiation can be emitted • 1) Alpha particles: 4He nuclei) • 2) Beta particles: either electrons or positrons (a positron is the antiparticle of the electron, similar to the electron except its charge is ...
Radioactivity - Mrs. Sjuts` Science Site
... together (STABLE) When it can’t, the nucleus can decay and give off matter and energy in a process of radioactivity Larger nuclei tend to be unstable – all nuclei containing more than 83 protons are radioactive ...
... together (STABLE) When it can’t, the nucleus can decay and give off matter and energy in a process of radioactivity Larger nuclei tend to be unstable – all nuclei containing more than 83 protons are radioactive ...
nuclear force
... electrons if the atom is unstable due to too many protons. • The electron will combine with a proton in the nucleus and form a neutron. • The atomic number decreases by one but the mass number stays the same. ...
... electrons if the atom is unstable due to too many protons. • The electron will combine with a proton in the nucleus and form a neutron. • The atomic number decreases by one but the mass number stays the same. ...
Physical Science: Nuclear Chemistry Study Guide
... 27. What are massive, positively charged particles emitted by some radioactive elements? 28. What is the time required for half a sample of radioactive nuclei to decay called? 29. After three half-lives, what fraction of the original radioactive element remains? 30. To determine the age of fairly re ...
... 27. What are massive, positively charged particles emitted by some radioactive elements? 28. What is the time required for half a sample of radioactive nuclei to decay called? 29. After three half-lives, what fraction of the original radioactive element remains? 30. To determine the age of fairly re ...
Lecture 30/3 Nuclear processes Ulf Torkelsson 1 Nuclear reactions
... the light nuclei that are released in these reactions will quickly react with other heavy nuclei in the environment. ...
... the light nuclei that are released in these reactions will quickly react with other heavy nuclei in the environment. ...
Nuclear Chemistry
... 82 protons and/or 2,8,20,28,50,82, or 126 neutrons are generally more stable than isotopes without these numbers. When we think of substances that shield radiation, we tend to think of lead. The most common isotope of lead is 20882Pb; that means it has 82 protons and 126 neutrons. ...
... 82 protons and/or 2,8,20,28,50,82, or 126 neutrons are generally more stable than isotopes without these numbers. When we think of substances that shield radiation, we tend to think of lead. The most common isotope of lead is 20882Pb; that means it has 82 protons and 126 neutrons. ...
Nuclear Chemistry - Northwest ISD Moodle
... • PROTONS give the atom its identity • Held together by a very strong nuclear force o One of the four fundamental forces in our universe o Incredibly powerful o Releasing nuclear force results in a nuclear reaction ...
... • PROTONS give the atom its identity • Held together by a very strong nuclear force o One of the four fundamental forces in our universe o Incredibly powerful o Releasing nuclear force results in a nuclear reaction ...
Charterhouse2-gelletly-elements
... turning 4 protons into an alpha releases about 26 MeV of energy. It is this energy which heats the stellar interior,allows it to withstand the gravitational pressure and causes it to shine! ...
... turning 4 protons into an alpha releases about 26 MeV of energy. It is this energy which heats the stellar interior,allows it to withstand the gravitational pressure and causes it to shine! ...
Nuclear drip line
In nuclear physics, the boundaries for nuclear particle-stability are called drip lines. Atomic nuclei contain both protons and neutrons—the number of protons defines the identity of that element (ie, carbon always has 6 protons), but the number of neutrons within that element may vary (carbon-12 and its isotope carbon-13, for example). The number of isotopes each element may have is visually represented by plotting boxes, each of which represents a unique nuclear species, on a graph with the number of neutrons increasing on the abscissa (X axis) and number of protons increasing along the ordinate (Y axis). The resulting chart is commonly referred to as the table of nuclides, and is to nuclear physics what the periodic table of the elements is to chemistry.An arbitrary combination of protons and neutrons does not necessarily yield a stable nucleus. One can think of moving up and/or to the right across the nuclear chart by adding one type of nucleon (i.e. a proton or neutron, both called nucleons) to a given nucleus. However, adding nucleons one at a time to a given nucleus will eventually lead to a newly formed nucleus that immediately decays by emitting a proton (or neutron). Colloquially speaking, the nucleon has 'leaked' or 'dripped' out of the nucleus, hence giving rise to the term ""drip line"". Drip lines are defined for protons, neutrons, and alpha particles, and these all play important roles in nuclear physics. The nucleon drip lines are at the extreme of the proton-to-neutron ratio: at p:n ratios at or beyond the driplines, no stable nuclei can exist. The location of the neutron drip line is not well known for most of the nuclear chart, whereas the proton and alpha driplines have been measured for a wide range of elements. The nucleons drip out of such unstable nuclei for the same reason that water drips from a leaking faucet: in the water case, there is a lower potential available that is great enough to overcome surface tension and so produces a droplet; in the case of nuclei, the emission of a particle from a nucleus, against the strong nuclear force, leaves the total potential of the nucleus and the emitted particle in a lower state. Because nucleons are quantized, only integer values are plotted on the table of isotopes; this indicates that the drip line is not linear but instead looks like a step function up close.