Across
- 3. neutral particle in the nucleus
- 6. A pure substance made of only one kind of atom
- 8. A state of matter that has a definite volume but no definite shape.
- 10. anything that takes up space and has mass
- 11. small negative particle that circles the nucleus
- 13. an element that is shiny and that conducts heat and electricity well
- 14. Definite shape and volume
Down
- 1. an element that conducts heat and electricity poorly
- 2. A state of matter with no definite shape or volume
- 4. Created the first periodic table. Arranged elements by increasing atomic mass
- 5. smallest particles made of electrons, neutrons, and protons
- 7. Table A table that shows the elements, their atomic number, symbol, and average atomic mass; elements with similar chemical properties are grouped together.
- 9. (semiconductors) are the elements that have the properties of both metals and nonmetals
- 12. positive particle in the nucleus