Across
- 3. the chemical formula H O is also known as _____
- 5. the smallest unit of matter
- 6. this science class is called _____
- 10. two or more element atoms together are called a _____
- 12. the mass of an element is also how much the element _____
- 13. the periodic table was invented by Dmitri _____
- 14. the flow of subatomic electrons through a metal is called _____
- 17. opposite magnetic or electrical charges _____
Down
- 1. an element's atomic number is how many _____ it has
- 2. 12 of something
- 4. $1,000 is also known as a _____
- 7. the lightest element in the universe
- 8. 6.023 x 10 of something
- 9. what children's birthday balloons are filled with
- 11. an element that has nonmetal properties (like it doesn't get hot) combined with metal properties (like it carries electricity) is called a _____
- 15. for atoms to bond together their outside electrons must equal what number?
- 16. Periodic _____ of Elements