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Unit 4 Vocabulary

Unit 4 Definitions

Atomic Mass Average mass of one atom of an element.
Periodic table A table where periods are arrangend.
Chemical Symbol 1 or 2 letter code that stands for elements.
Period Row of elements in the periodic table.
Group Column of elements in the periodic table.
Matter The stuff that everything is made of.
Element The building blocks of matter.
Compound Matter made up of 2 or more elements.
Atom Smallest particle an element can go.
Electron Negatively charged particle outside an atom.
Nucleus Structure near the center of the cell.
Proton Compound or element that is the result of chemical eaction.
Neutron Paticle with neutral charge.
Energy level Amount of energy in a electron.
Isotope Atoms with same number of neutrons in the nucleus.
Mass number Sum of protons and neutrons in the nucleus.
Atomic number Number of protons and neutrons in the nucleus.
Metal Elements solid with a shiny surface.
Created by: Ernesto Sanchz