PS: Chemistry P2

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Across
  1. 5. Any change that doesn’t change the identity. Observed with senses. Determined without changing matter.
  2. 6. The transition of a substance directly from the solid to the gas state, without passing through the liquid state
  3. 7. A chemical reaction where energy is released from the system to the surroundings
  4. 10. The outside of the atom. Where electron's are located.
  5. 11. One of the fundamental states of matter. A high-energy state of atoms and molecules.
  6. 12. A substance that speeds up a chemical reaction, but itself does not undergo any permanent chemical change
  7. 15. An element or compound produced by a chemical reaction.
  8. 17. The center of the atom. Where the Proton and neutron are located.
  9. 18. A reaction in which two nuclei combine to form a nucleus.
  10. 21. A neutral particle located in the nucleus with a charge of zero.
Down
  1. 1. A reaction in which the nucleus of an atom splits into two or more smaller, lighter nuclei.
  2. 2. Any change that does change the identity. Indicates how substance reacts with something else. Matter will be changed into a new substance
  3. 3. Atoms combined in fix quantities. Atoms can be separated only by destroying substance.
  4. 4. Energy in chemical reactions, it is the energy required to break chemical bonds to allow the reaction to proceed to products
  5. 6. Physical change of matter that are reversible.
  6. 8. An element or compound that enters into a chemical reaction.
  7. 9. A positively charged subatomic particle located in the nucleus of an atom.
  8. 13. One of the fundamental states of matter in which the molecules have both a fixed volume but not a fixed shape
  9. 14. One of the fundamental states of matter in which the molecules do not have a fixed volume or shape. Molecules move the fastest.
  10. 16. A negatively charged subatomic particle located outside of the nucleus of the atom.
  11. 19. Atoms of the same element with identical atomic numbers but different atomic masses due to different number of neutrons in the nucleus
  12. 20. One of the fundamental states of matter in which the molecules have both a fixed volume and a fixed shape. Molecules move the slowest.
  13. 22. A chemical reaction where energy is absorbed by the system from the surroundings