Across
- 5. A substance that cannot be separated or broken down into simpler substances by chemical means; all atoms of an element have the same atomic number
- 10. A substance made up of atoms of two or more different elements joined by chemical bonds
- 13. A measure of the amount of matter in an object
- 14. A change that occurs when one or more substances change into entirely new substances with different properties
- 17. Vertical column on the periodic table; also known as a group
- 19. A property that does not depend on the amount of matter present, such as pressure, temperature, or density
- 21. An element that is shiny and that conducts heat and electricity well
- 22. A change of a substance from one physical state to another
- 23. A form of matter that does not have a definite volume or shape
- 24. Anything that has mass and takes up space
- 25. The state of matter that has a definite volume but not a definite shape
Down
- 1. A substance or molecule that participates in a chemical reaction
- 2. In chemistry, a horizontal row of elements on the periodic table
- 3. The smallest unit of an element that maintains the properties of that element
- 4. A characteristic of a substance that does not involve a chemical change, such as density, color, or hardness
- 6. The process by which one or more substances change to produce one or more different substances
- 7. A property of matter that describes a substances ability to participate in chemical reactions
- 8. A change of matter from one form to another without a change in chemical properties
- 9. A property that depends on the extent or size of a system
- 11. In physical science, a state of matter that starts as a gas and then becomes ionized; it consists of free-moving ions and electrons, it takes on an electric charge, and its properties differ from those of a solid, liquid, or gas
- 12. Any substance that has a defined composition
- 15. An element that has properties of both metals and nonmetals; sometimes referred to as semiconductor
- 16. The scientific study of the composition, structure, and properties of matter and the changes that matter undergoes
- 18. The state of matter in which the volume and shape of a substance are fixed
- 20. An element that conducts heat and electricity poorly and that does not form positive ions in an electrolytic solution
- 23. A vertical column of elements in the periodic table; elements in a group share chemical properties; also known as a family