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Phys. Sci. Chap. 5
Vocabulary
Question | Answer |
---|---|
Periodic Law | The law that states that the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements. |
Period | A horizontal row of elements in the periodic table. |
Group | A vertical column of elements in the periodic table; elements in a group share chemical properties. |
Ion | An atom, radical, or molecule that has gained or lost one or more electrons and has a negative or positive charge. |
Metal | An element that is shiny and that conducts heat and electricity well. |
Nonmetal | An element that conducts heat and electricity poorly. |
Semiconductor | An element or compound that conducts electric current better than an insulator does but not as well as a conductor does. |
Alkali Metal | One of the elements of Group 1 of the periodic table. |
Alkali Earth Metal | One of the elements of Group 2 of the periodic table. |
Transition Metal | One of the metals that can use the inner shell before using the outer shell to bond. |
Nobel Gas | One of the elements of Group 18 of the periodic table. |
Halogen | one of the elements of Group 17 of the periodic table. |