Voc.
Atomic Mass
average mass number of all atoms of an element
a property of a subatomic particle positive (protons) negative (electrons) or neutral (neutrons)
Electrical Charge
Proton
a positively charged particle within the atomic nucleus used to identify an element
Physical property
property of matter the composition hat can be observed without changing the composition or identity of the matter
The positively charged center of an atom
Nucleus
Electron
a negatively charged particle in the electron cloud surrounding the atomic nucleus
a conceptual model in which the elements are organized according to their properties often displayed as a chart
Periodic table
a particle smaller than an atom such as a neutron or electron
Subatomic particle
Atom
smallest particle of an Atom
the number of protons in the nucleus of an atom used to determine an element's position in the Periodic Table
Atomic Number
the vertical columns on the Periodic Table
groups
the negatively charged space containing electrons that surrounds the atomic nucleus
Eletronic cloud
Element
pure substance that cannot be broken down chemically into simpler substances
electron(s) located in outer energy level (electron shell)
Valence
Chemical property
a characteristic of a substance that describes how it combines with other substances to form new ones
Reactivity
tendency of a substance to undergo chemical changes in a system
a (neutral) particle with no electrical charge within the atomic nuleus
Neutron
the horizontal rows on the Periodic Table
Periods
Mass Number
total number of protons and neutrons in a specific atom
Name a few metals
Gold, Silver, Alloy and Titanium