Across
- 2. Property A characteristic that describes how a substance interacts with other substances to form new substances (e.g., flammability, reactivity).
- 5. Anything that has mass and occupies space.
- 10. A group of two or more atoms bonded together, representing the smallest unit of a chemical compound.
- 12. A row in the periodic table, where elements have the same number of electron shells.
- 15. A type of mixture where one substance is dissolved evenly in another (e.g., salt in water).
- 16. Change A change in which a substance transforms into a different substance with a new chemical composition, such as burning, rusting, or digestion.
- 19. Theory of Matter The theory that all matter is made up of particles that are in constant motion; the speed of the particles affects the state of matter.
- 20. Table A chart that organizes all known elements by their atomic number, electron configuration, and recurring chemical properties.
- 21. A state of matter in which the particles are far apart and move freely, having neither a fixed shape nor a fixed volume.
- 22. The center of an atom, made up of protons and neutrons.
- 26. The basic unit of matter, consisting of protons, neutrons, and electrons.
- 27. The mass of an object divided by its volume; a measure of how tightly packed the particles are in a substance.
- 30. The process in which a liquid changes to a gas throughout the liquid, not just at the surface.
- 31. Property A characteristic of matter that can be observed or measured without changing the substance's chemical identity (e.g., color, shape, size, texture).
- 32. A positively charged particle found in the nucleus of an atom.
- 34. A state of matter in which the particles are tightly packed and have a fixed shape and volume.
- 35. The process in which a solid changes to a liquid as it gains heat.
- 36. of Conservation of Matter Matter cannot be created or destroyed in a chemical reaction; it only changes form.
Down
- 1. A neutral particle found in the nucleus of an atom.
- 3. A substance made from two or more different types of atoms bonded together in a fixed ratio.
- 4. The process in which a liquid changes to a gas at the surface of the liquid.
- 6. A pure substance made of only one type of atom, cannot be broken down into simpler substances by chemical means.
- 7. Mass The average mass of an element's atoms, based on the number of protons and neutrons.
- 8. Change The transition of matter from one state to another, such as melting, freezing, condensation, or vaporization.
- 9. The process in which a liquid changes to a solid as it loses heat.
- 11. A negatively charged particle that orbits the nucleus of an atom.
- 13. The amount of space an object or substance occupies, measured in liters (L), milliliters (mL), or cubic centimeters (cm³).
- 14. Number The number of protons in the nucleus of an atom, which defines the element.
- 17. The process in which a gas changes to a liquid, often when it cools down.
- 18. Atoms of the same element that have the same number of protons but a different number of neutrons, resulting in different atomic masses.
- 20. A state of matter where atoms are ionized, consisting of free electrons and ions (commonly found in stars and lightning).
- 23. The process in which a solid changes directly into a gas without passing through the liquid phase (e.g., dry ice).
- 24. Electrons Electrons in the outermost energy level of an atom, important for chemical bonding.
- 25. A state of matter in which the particles are close together but can move past one another, having a definite volume but no fixed shape.
- 28. A combination of two or more substances that are not chemically bonded and can be separated by physical means.
- 29. Change A change in a substance that does not alter its chemical composition, such as changes in state (solid, liquid, gas), shape, or size.
- 33. The amount of matter in an object or substance, usually measured in grams or kilograms.