any material that cannot be broken down into simpler substances
Elements share common properties. an element that is shiny and conducts heat and electricity well
the smallest component of an element having the chemical properties of the element
The center of an Atom
positively charged particle of an atom
the number of protons in an atom
particle with no charge
particle with a negative charge
total mass of the protons and neutrons in an atom, measured in atomic mass units
a combination of two or more atoms
an arrangement of elements in which the elements are separated into groups based on a set of repeating properties
elements with properties that fall between those of metals and nonmetals
Elements that are dell, poor conductors and brittle
Properties of elements
State of matter at room temp, metals, NonmetalsElements or metallics, the way they combine with other metals
Most elements are this at room temp
More likely to combine with other elements to form a new substance
A way of describing molecules using letters and numbers
Top row of periodic table
Bottom row of elements
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