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PERIODIC TABLE

PERIODIC TABLE
Kade Martin
Across
particle with a negative charge outside the nucleus of an atom
number of groups/families on the periodic table
basic particle from which all elements are made
particles inside a nucleus with a positive charge
number of periods in the periodic table
total weight of protons and neutrons
group 2 elements not as reactive as group 1
number of protons in an atom which uniquely identifies an element
table in which the chemical elements are arranged in order of increasing atomic number
region on the periodic table between the metals and the nonmetals
Down
molecule composed of one kind of atom; cannot be broken into simpler units by chemical reactions
abbreviation of an elements name; 1 or 2 letters
particle inside the nucleus with no charge
law that states that the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements
electrons on the outermost energy level of an atom
elements that are good conductors of heat and electric current
horizontal rows on the periodic table
sum of the number of neutrons and protons in an atomic nucleus
creator Periodic Table
atom or group of atoms that has gained or lost one or more electrons