Elements and Chemical Changes

Clues in this puzzle

Across

• Flaky reddish product formed by iron oxidation (4)
• Lustrous, conductive element located on the left and center of the table (5)
• Undergo a physical change from solid to liquid (4)
• Substance formed when two or more elements chemically unite (8)
• Ionic compounds produced alongside water during acid-base neutralization (5)
• Binary compound containing oxygen combined with another element (5)
• Inert noble gas famous for brilliant reddish-orange signage (4)

Down

• Direct physical phase change from solid to gas without melting (11)
• Pure chemical substance that cannot be broken down by ordinary reactions (7)
• Versatile tetravalent backbone of all organic molecules (6)
• Starting material consumed during a chemical transformation (8)
• Basic building block of all chemical elements (4)
• Dense element denoted by the symbol Pb (4)
• Magnetic metal whose symbol derives from ferrum (4)

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