Phases of Matter

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  1. 4. A subatomic particle found in the nucleus of an atom that has a positive charge.
  2. 7. A phase of matter characterized by having a fixed shape and volume, and particles that are closely packed together
  3. 10. The smallest unit of an element that retains the chemical properties of that element.
  4. 12. The process by which a liquid changes into a gas as a result of an increase in temperature.
  5. 14. The process by which a gas changes directly into a solid without going through the liquid phase, as a result of a decrease in temperature or an increase in pressure.
  6. 15. Theory A scientific theory that explains the nature and behavior of matter in terms of atoms.
  7. 16. A phase of matter that has no fixed shape or volume, and particles that are far apart and move freely in all directions.
  8. 18. The process by which a gas changes into a liquid as a result of a decrease in temperature or an increase in pressure.
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  1. 1. A British chemist who developed the modern atomic theory in the early 19th century, which proposed that all matter is composed of indivisible and indestructible atoms.
  2. 2. A phase of matter that occurs at high temperatures, where atoms lose their electrons and become ionized, resulting in a mixture of free electrons and positively charged ions.
  3. 3. The process by which a solid changes directly into a gas without going through the liquid phase, as a result of an increase in temperature or a decrease in pressure.
  4. 5. A subatomic particle found in the nucleus of an atom that has no charge.
  5. 6. An ancient Greek philosopher who proposed the concept of the atom as the fundamental unit of matter.
  6. 8. A phase of matter that has a definite volume but no definite shape, and particles that are close together but free to move around each other.
  7. 9. The process by which a liquid changes into a solid as a result of a decrease in temperature.
  8. 11. A subatomic particle found in the electron cloud outside the nucleus of an atom that has a negative charge.
  9. 13. The process by which a solid changes into a liquid as a result of an increase in temperature.
  10. 17. Anything that has mass and takes up space is considered as matter.