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Chemistry

Across
Any of the elements fluorine, chlorine, bromine, iodine and astatine; occupying Group 17 of the periodic table
Any of the set of metallic elements occupying a central block in the periodic table
A solid substance that has a conductivity between that of an insulator and that of most metal; either due to the addition of an impurity or because of temperature effects
The rate at which heat passes through a specified material
Any of the gaseous elements helium, neon, argon, krypton, xenon, and radon
Elements that are good conductors of electric current or heat
Able to be hammered or pressed permanently out of shape without breaking or cracking
Down
Any of the divalent strongly basic metals of Group 2 of the periodic table
Able to be deformed without losing toughness; pliable, not brittle
Molecule composed of only two atoms of either the same or different chemical elements
The state of power being reactive or degree to which a thing is reactive
An element whose properties are intermediate between those of metals and solid non metals
Any of the elements lithium, sodium, potassium, rubidium, cesium and francium; occupying Group 1 of the periodic table
The process of corroding metal, stone or other materials
An element or substance that is not a metal
A thin coating containing oxidized metal that gives an iridescent glaze to ceramics