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Atomic Theory and the Periodic Table


Horizontales
Elements are made of atoms
Essential to Science
Smallest unit of an element
Make up compounds
Allows us to build new technologies
Horizontal rows
K
Accounts for a positively charges central mass
N
Na
Verticales
Accounts for negative electrons
Seven on the periodic table shares characteristics of both metals and nonmetals
Located outside of the nucleus
Determines the type of element
Highly reactive
Proton-Neutron-Electron
Equals the number of protons
Brittle and kind of dull
Contains Protons and Neutrons
No charge
May be modified by new evidence
Groups in the periodic table
Same mass as a neutron
Good Conductors of electricity