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Chapter 19 - A.G
Vocab.
Term | Definition |
---|---|
Metal | Element that typically is a hard, skinny solid, is malleable, and is a good conductor of heat and electricity. |
Malleable | Can be hammered or rolled into sheets. |
Ductile | Ability of metals to be drawn into wires. |
Metallic Bonding | Positively charged metallic ions are surrounded by a cloud of electrons. |
Radioactive Element | One in which the nucleus breaks down and gives off particles and energy. |
Transition Element | Those elements in Groups 3 through 12 in the periodic table. |
Nonmetal | Elements that usually are gases or brittle solids at room temperature. |
Diatomic Molecule | A molecule that consists of two atoms of the same element. |
Salt | A halogen gains and electron form a metal, an ionic compound. |
Sublimation | The process of a solid changing directly to a vapor without forming a liquid. |
Metalloid | Can form ionic and covalent bonds with other elements and can have metallic and nonmetallic properties. |
Allotrope | Different forms of the same element having different molecular structures. |
Semiconductor | Elements that conduct an electric current under certain conditions. |
Transuranium Element | Elements having more than 92 protons, the atomic number of uranium. |