Across
- 1. Elements and compounds are both __ substances
- 6. Fizzing and foaming and change in temperature are signs that a __ change is occurring
- 10. Gets credit for organizing the Periodic Table
- 11. Particle in an atom with a negative charge
- 12. A reaction that produces and gives off heat
- 13. Found on the Periodic Table
- 14. Law that states that in a closed system, the mass before a change occurs will equal the mass after the change
- 15. The new substances formed during a chemical reaction are called __
- 16. Two or more elements chemically joined in a specific ratio
- 17. Smallest unit of a compound that maintains the properties of the compound
Down
- 1. Density and malleability are examples of __ properties
- 2. Two or more elements and/or compounds NOT chemically combined
- 3. Is equal to the number of protons in an atom
- 4. A property that is unique to a substance and can be used to identify the substance
- 5. A reaction that uses heat energy and therefore feels cool
- 7. Particle in an atom with a positive charge
- 8. Smallest unit of an element that maintains the properties of the element
- 9. The substances on the left side of a chemical equation are called __