Sci 1 (part 2) Flashcards
Under what circumstance can resonance apply?
bonding in molecules with more than two atoms
What theory replaced the resonance model?
molecular orbital theory
Does CO2 have a dipole moment?
no
Highly polar molecules will exhibit strong ___ ___ ___ forces
van der Waals
What type of molecules have the lowest melting and boiling points?
nonpolar
What can lead to unstable nuclei?
varying the ratio of neutrons to protons
What process involves the loss of a helium nucleus?
Alpha decay
What process occurs during beta decay?
a neutron transforms to a proton
what do unstable nuclei result in?
radioactive decay
What is lost during Alpha decay?
two neutrons and two protons
What type of nuclei break up by alpha decay?
large
Above what size do nuclei decay by alpha decay?
larger than bismuth
What does beta minus decay result in?
loss of one neutron and gain of one proton
what is positron decay aka?
beta plus
What are the electrons emitted during beta decay called?
beta particles
Is the alpha particle stable or unstable?
stable
What type of reaction occurs if there are too many neutrons?
beta minus decay
What type of reaction occurs if there are too few neutrons?
positron emission
What is a positron?
positively charged electron
What other element is involved in a fusion reaction with deuterium?
tritium
What are typically the masses of the products in a uranium fission reaction?
130 and 100 amu
