Create an account
the result of a natural change of an isotope of one element into an isotope of a different element
stream of positively charged particles (alpha particles) they have a +2 charge and a mass of 4 amu
composed of a stream of negatively charged particles (beta particles) that have properties similar to an electron
consists of electromagnetic radiation of very short wavelengths (high frequency and high energy) most dammaging of radioactive particles
particle equal in mass but opposite of charge to an electron (emission = decrease of atomic number by one)
does not spontaneously decompose into a different element
1. most stable when the number of neutrons is equal to or greater than the number of protons with exception to H-1 and He-3
2. elements with low atomic numbers, the number of neutrons is almost equal to the number of protons
3. nuclear stability is greater for isotopes that contain even numbers of protons and neutrons
the period of the time required for exactly one half of the number of atoms in the original sample to undergo a radioactive decay, forming a new element
splitting of heavy nuclei into smaller nuclei releasing large amounts of energy in the process
forces between particles caused by their differences in electric charges (ionic bond) --> form and ionic compound
atoms share some or all their valence electrons in such a manner as to achieve a noble gas configuration
the ability of an atom during bond formation to attract electrons from its bonding partner
strength of a polar bond (based on the differences in electronegativities of the atoms involved in bonding
valence shell electron pair repulsion theory
(VSEPR) the groups of electrons arrange themselves about the central atom in such a way that lowers the molecules overall energy
electron pair shape
this includes the unbonded electron pair connected to the central atom
1. linear (180)
2. trigonal planar (120)
3. tetrahedral (109.5)
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together