Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Nuclear Chemistry
| Question | Answer |
|---|---|
| Chemical reactions | Atoms are trying to reach a stable electron configuration |
| Nuclear Chemistry | Concerned with reactions that take place in the nucleus to obtain stable nuclear configurations |
| Radioactivity | The emission of particles and/or energy from an unstable nucleus |
| Radiation | The particles and/or energy that are emitted from an unstable nucleus |
| Alpha radiation | Emission of helium nuclei |
| Alpha particles | Contain 2 protons & 2 neutrons (with a charge of +2). The largest of radioactive emissions, penetration can be stopped by paper |
| Beta radiation | A product of the decomposition of a neutron or proton. Composed of high energy, high speed electrons that began as neutrons or protons. - charge (electrons) or + charge (positrons). Stopped by a thin sheet of aluminum foil, lucite, or plastic. |
| Gamma radiation | High-energy electromagnetic radiation, similar to xrays but with more energy. Can go through several feet of concrete or several inches of lead. Lead shielding is required to block gamma rays. |
| Half-life | The amount of time it takes an unstable isotope to decay into a more stable form |
| An unstable atom decays until _____? | A stable nuclear configuration is found usually by emitting radioactive particles |
| Kinetic energy | The energy resulting from the motion of the object. KE =1/2 mv^2 . Mass is kg. Velocity is meters per second |
| Potential energy | The energy the object has because of its position, PE=mgh m= mass of object, g=acceleration caused by gravity, and h=the height at which the object is located above the ground m= kg,g=9.8 m/s ^2, h=meters |
| Kinetic and potential energy are expressed as ____? | joules |
| joule | Newton-meter or a kilogram-meter squared per second per second squared |
| The law of conservation of energy | Energy must be conserved, kinetic and potential energy can be interchanged if we assume that there is no friction or air resistance present |
| The energy levels or shells in which the electron orbits are labeled ____? | They are lettered beginning with k, k=1, l=2, m=3, and ... |
| The closer the electron shell the stronger _______ | The binding energy (how tightly the electron is bound to the nucleus) |
| Each shell holds a specific number of electrons, how do you find that number? | 2n^2, n=the shell number |
| A stable atom has _____ | Equal numbers of protons and electrons |
Created by:
Beckster89
Popular Chemistry sets