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Periodic Table Crossword Puzzle

Across
Mostly used in electronics
A ____ is used to name the element
Discovered by polish chemist Sniadecki.
What is used to make steel
A stable subatomic particle with a charge of negative electricity
The _____ _____ determines what temperature the substance will melt
Electrons hat is associated with an atom, and that can participate in formation of a chemical bond.
The basic unit of a chemical element
Lightest element on periodic table
Red/orange color that is soft, malleable, and ductile
Considered a rare earth element with atomic number 21
Radius of an atoms ion
What is used to make balloons float
Down
Most "precious" metal in investments
What the military uses for high density penetrators
Most abundant element on earths crust
The atomic ____ of protons in the nucleus
The outside part of an atom around the atomic nucleus
Slightly soluble in water
What is used to make cans
The mass of an atom of a chemical element expressed in units
Stable subatomic particle occurring in all atomic nuclei, positive charge equal in magnitude to that electron but of opposite sign.
Highly toxic gas and most electronegative element
What is used in pencils
What most wedding rings have