Across
- 6. An atom or group of atoms that is no longer neutral because it has a positive or negative charge.
- 7. Elements that spontaneously emit radiation
- 10. A measure of how much solute can dissolve in a given solvent at a given temperature and pressure
- 11. Two or more atoms held together by covalent bonds that acts as an independent unit
- 12. A chemical bond that involves sharing a pair of valence electrons between atoms in a molecule
- 13. The smallest piece of an element that still represents that element.
- 14. A state of matter that HAS a definite shape and a definite volume
- 15. A state of matter that has a definite volume but no definite shape.
- 18. Electrons on the outermost energy level of an atom that participate in chemical bonding
- 20. An atom that is no longer electrically neutral because it has lost or gained valence electrons
- 21. A group of chemical symbols and numbers that represent the elements and the number of atoms of each element that make up a compound
- 23. characteristic of matter that you can observe or measure without changing the identity of the matter
- 25. The law that states that the total mass of the reactants before a chemical reaction is the same as the total mass of the products after the chemical reaction
- 27. A representation of the valence electrons in an atom around the element's chemical symbol, using dots
- 29. A change in the size, shape, form, or state of matter that does not change the matter's identity
- 30. The force that holds two or more atoms together
- 32. A process that occurs when an unstable atomic nucleus changes into another more stable nucleus by emitting radiation
Down
- 1. A region around the nucleus of an atom where electrons are likely to be found
- 2. Center of an atom
- 3. A bond formed when many metal atoms share their pooled valence electrons
- 4. The attraction between oppositely charged ions in an ionic compound
- 5. A molecule that has a partial positive end and a partial negative end because of unequal sharing of electrons
- 8. The ability or inability of a substance to combine with or change into one or more new substances
- 9. The number of protons in an atom
- 12. A change that occurs when one or more substances change into entirely new substances with different chemical and physical properties.
- 16. A state of matter with NO definite shape or volume
- 17. The sum of the number of neutrons and protons in an atom
- 19. Amount of space occupied by an object
- 22. Mass per unit volume
- 23. A particle with one positive charge (1+)
- 24. A particle with one negative charge (1-)
- 26. A small particle in the nucleus of the atom, with no electrical charge
- 28. Atoms of the same element that have different numbers of neutrons
- 31. The amount of matter in an object