Studied by 3 people
Organisms
________ & the environment is subject to the laws of physics and chemistry.
Electrons
________ form negatively charged "cloud "around nucleus.
Tracers
________ used to track atoms through the bodys metabolism.
organic molecules
They make up 96 % of living matter (carbon + hydrogen= ________)
Radioactive isotopes
________ decay spontaneously, giving off particles and energy.
Chemical compounds
________ can be broken down by chemical reactions & are arranged in a fixed ratio.
Isotopes
________: 2 atoms of the same element with different number of neutrons.
Organisms
________ are made up of matter.
==Chemical connection to biology
==
==Elements of Life
==
20-25% of 92 elements are required for life (oxygen, nitrogen
ammonia, carbon, hydrogen)
TRACE ELEMENTS
Elements required in very little amounts/minute quantities (ex
Neutron mass =
proton mass
Isotopes
2 atoms of the same element with different number of neutrons
Note 
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