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12 Cards in this Set

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  • Back
what is RADIOACTIVITY?
emitting radiation when certain nuclei spontaneously change into different nuclei
what terms are used to describe nuclei change when becoming radioactive?
radioactive DECAY OR DISINTEGRATION

ALPHA, BETA PARTICLE AND GAMMA RAY
what is a NUCLEON
collective term for atom's nuclear structure. contains protons and neutrons
the elemental notation "A" represents...
mass number, protons and neutrons
upper left
elemental notation "Z" represents...
atomic number, protons in nucleus, lower left
elemental notation "N" represents...
number of neutrons
define electrically neutral atom
extranuclear E = protons on nucleus
what is an ISOTOPE
SPECIES OF SAME ELEMENT HAVING SAME PROTONS AND NEUTRONS
define ISOBARS
ELEMENT SPECIES WITH SAME MASS BUT DIFFERENT ATOMIC NUMBER
define ISOTONE
species with same # of neutrons
define ISOMERS
species with SAME MASS AND ATOMIC NUMBER
characteristics of RADIONUCLIDES
have unstable n/p ratio, tries to gain stability thru nuclear transformation leading to different species: radioactive decay