Across
- 5. in chemistry, a horizontal row of elements in the periodic table
- 7. an element that has properties of both metals and nonmetals
- 8. a one, two, or three letter abbreviation of the name of an element
Down
- 1. the number of protons in the nucleus of an atom
- 2. a vertical column of elements in the periodic table, elements in a group share chemical properties
- 3. an element that conducts heat and electricity poorly
- 4. an arrangement of the elements in order of their atomic numbers
- 6. an element that is shiny and that conducts heat and electricity well