A&P Ch.2&3 Chemistry & The Cell
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15 Terms
Atoms
The physical world (matter) is made up of _____ and join together to form chemicals with different characteristics.
Atoms
What are the smallest units of matter with their own chemical characteristics?
Physiology
Atoms join together to form chemical characteristics which determine the ______ of living organisms at the molecular and cellular level.
Central Nucleus & Electron Cloud
What are the 2 basic regions of an atom?
Central Nucleus
Contains heavy particles.
Electron Cloud
Contains very light, moving particles.
Protons
Neutrons
Electrons
What are the 3 major types of smaller or subatomic particles?
Electrical Charge (+ or -)
Weight or Mass
Location in the Atom
How are particles defined?
Positive
Protons have a _____ charge and have about 1 unit of mass, in the central nucleus.
Neutrons
_____ has no electrical charge (neutral/ uncharged), about 1 unit of mass, in the central nucleus.
Negative
Electrons have a _____ charge and a very small mass.
Electrons
Which subatomic particle spins rapidly in a cloud around the central nucleus?
Note 
Flashcards (34)