Across
- 1. An organized chart of elements arranged by atomic number.
- 6. Digits in a measurement that include all certain digits and one estimated digit.
- 8. The reactant that is used up first and determines the amount of product formed.
- 10. A compound formed when nonmetals bond together.
- 12. An atom has 17 protons and 18 electrons. What is its charge?
Down
- 2. Write the name of the molecular compound N₂O₄.
- 3. A problem-solving method that uses conversion factors to cancel units.
- 4. Nitrogen and hydrogen react according to the equation N₂ + 3H₂ → 2NH₃. If 5.0 moles of N₂ react completely, how many grams of NH₃ are produced? (Round to the nearest whole gram.)
- 5. A method of expressing very large or very small numbers using powers of ten.
- 7. The ratio of mass to volume of a substance.
- 9. The calculation of quantities in chemical reactions using balanced equations.
- 11. An atom has 11 protons and 10 electrons. What is its charge?