| A | B |
|---|
| ductile | able to be drawn into a thin wire |
| family | column of elements in the periodic table |
| group | column of elements in the periodic table |
| metal | element that is a good conductor of heat and electricity, is shiny, has a high melting point, is ductile and malleable, and forms positive ions |
| malleable | able to be hammered into a thin sheet |
| metalloid | element that has properties of both metals and nonmetals |
| nonmetal | element that is a poor conductor of heat and electricity, has a dull surface, low melting point, is brittle, breaks easily, and forms negative ions |
| period | horizontal row of elements in the periodic table |
| periodic | repeating according to the same pattern |
| periodic law | the physical and chemical properties of the elements are periodic functions of their atomic numbers |
