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6.2 Element Classes
Term | Definition |
---|---|
physical property | A characteristic of a pure substance that can be observed without changing it into another substance |
physical change | A change in a substance that does not involve a change in the identity of the substance |
chemical property | A characteristic of a pure substance that describes its ability to change into different substances |
chemical change | A change in matter that produces one or more new substances |
metal | elements characterized by physical properties that include shininess, malleability, ductility, and conductivity. |
ductile | can be drawn into wires |
malleable | capable of being changed; easily shaped |
nonmetals | Elements that are poor conductors of heat and electric current |
brittle | Easily broken; not flexible |
monatomic | consisting of one atom |
covalent bonding | results from the sharing of electron pairs between two atoms |
diatomic | consisting of two atoms |
allotropes | two or more different molecular forms of the same element in the same physical state |
metalloids | Elements that have properties of both metals and nonmetals. |
semiconductor | A substance that can conduct electricity under some conditions |