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22 terms

Science - Elements

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Element
any material that cannot be broken down into simpler substances
Metal
Elements share common properties. an element that is shiny and conducts heat and electricity well
Atom
the smallest component of an element having the chemical properties of the element
Nucleus
The center of an Atom
Proton
positively charged particle of an atom
Atomic number
the number of protons in an atom
Neutron
particle with no charge
Electron
particle with a negative charge
Atomic mass
total mass of the protons and neutrons in an atom, measured in atomic mass units
Molecule
a combination of two or more atoms
Periodic table
an arrangement of elements in which the elements are separated into groups based on a set of repeating properties
Metalloids
elements with properties that fall between those of metals and nonmetals
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
Solid
Chemically reactive
More likely to combine with other elements to form a new substance
Chemical formula
A way of describing molecules using letters and numbers
H2O
Water
NaCl
Salt
CO2
Carbon dioxide
Top row of periodic table
Lanthanides
Bottom row of elements
Actinides