Unit 2 Science Voabulary

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Across
  1. 3. point The temperature at which the vapor pressure of a liquid element equals the pressure surrounding the liquid
  2. 6. A covalent bond in which two atoms share a pair of electrons
  3. 7. Change A (usually irreversible) change in a substance that rearranges its atomic structure and therefore it’s chemical and physical properties
  4. 8. The transition of an element from a solid to a gas, without transitioning to a liquid first
  5. 10. A substance that takes part in and undergoes change during a reaction.
  6. 11. Change A change in a substance that affects its state of matter, but not its chemical makeup
  7. 13. compound A substance composed of exactly two elements that cannot be simplified by any further means
  8. 15. bond Covalent bond between two atoms in which electrons are shared unequally
  9. 16. point The temperature at which the solid form of an element becomes a liquid.
Down
  1. 1. bond A chemical bond formed between two ions with opposite charges. A chemical bond formed between two ions with opposite charges. Atoms may share
  2. 2. A chemical bond that involves the sharing of electron pairs between atoms
  3. 4. Two or more atoms bonded together, the smallest unit of a chemical compound that can take part in chemical bonding
  4. 5. Ion An ion comprised of two or more atoms.
  5. 9. number A number assigned to an element in chemical combination that represents the number of electrons lost (or gained, if the number is negative) by an atom of that element in the compound
  6. 11. A substance that forms as a result of a chemical reaction
  7. 12. A hot ionized gas consisting of approximately equal numbers of positively charged ions and negatively charged electrons. Due to its properties being very different from regular gasses, it is sometimes referred to as the fourth state of matter
  8. 14. An atom or group of atoms that has a positive or negative charge as a result of the loss or gain of an electron(s)