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A Periodic Table Crossword Puzzle

Horizontales
made or caused by human beings
colorless, oder-less, reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air.
a yellow precious metal, the chemical element of atomic number 79
a table of the chemical elements arranged in order of atomic number
an element or substance that is not a metal.
H2O is the ________ ______ for water
a solid material that is typically hard, shiny, and malleable
mass of an atom of a chemical element expressed in ______ units.
a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge
a subatomic particle of about the same mass as a proton but without an electric charg
Verticales
a colorless, odorless, highly flammable gas, the chemical element of atomic number 1
a set of elements occupying an entire horizontal row in the periodic table.
each of more than one hundred substances that cannot be chemically interconverted or broken down into simpler substances
the chemical element of atomic number 2, an inert gas that is the lightest member of the noble gas series.
Water is a ____________
the number of protons in the nucleus of an atom,
of, relating to, or resembling metal or metals.
a thing that is composed of two or more separate elements
the basic unit of a chemical element.
a set of elements occupying a column in the periodic table