Elements & the Periodic Table

electron
negatively charged particle that orbits the atom’s nucleus
subscript
small number slightly below symbol that tells the number of atoms in a molecule
coefficient
large number in front of formula that reveals the number of molecules
group
columns of the Periodic Table
period
rows of the Periodic Table
protons
positively charged particles located in the atom’s nucleus
neutron
neutral particle located in the atom’s nucleus
nucleus
central part of the atom which contains protons and neutrons
atomic number
number for each element on the Periodic Table that reveals the number of protons (and electrons)
mass number
number for each element on the periodic table that reveals the total mass of the nucleus
metalloids
group of elements on the Periodic Table that demonstrates properties of both metals and nonmetals
noble gases
elements in the far right group that are not reactive
metals
elements located to the left of the zig zag
symbol
letter representation of an element
formula
letter representation of a molecule
atom
smallest part of matter
element
matter that is made up of one type of atom
molecule
smallest part of a compound; two or more atoms chemically combined
compound
two or more elements chemically combined
valence
electrons on the outer orbit that are involved in chemical bonding
homogeneous
mixtures that are evenly and throughly mixed;solutions
heterogeneous
mixtures that are not mixed well
solutions
homogeneous mixtures
solutes
that which is dissolved in solutions
solvent
the liquid that dissolves the solute
insoluable
inability to dissolve
soluable
ability to be dissolved
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