Atoms, molecules, and the elements


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Atoms, molecules, and the elements

  1. 1. A Science Unit for Mrs. Berg’s Class
  2. 2. atom 1. The basic building block of matter. 2. The smallest component of an element having the chemical properties of the element.
  3. 3. chemical formula noun A chemical formula or molecular formula is a way of expressing information about the atoms that constitute a particular chemical compound. ex. Al2(SO4)3
  4. 4. compound noun,verb,adjectiveA substance made up of two or more elements chemically joined together into a molecule. NaCl = salt
  5. 5. electron noun particle in an atom that has a negative electrical charge
  6. 6. element noun A substance whose atoms are all alike. There are over 100 elements on the Periodic Table.
  7. 7. gas noun,verb One of the three states of matter. This state of matter has no fixed shape and no fixed volume.
  8. 8. heterogeneous adjective These types of mixtures contain more than one substance evenly mixed but not chemically bonded together and is the same throughout.
  9. 9. homogeneous adjective When two or more substacnes come together but dont chemically combine or bond to make a new substance it is called this.
  10. 10. inorganic adjective Any substance that does not contain carbon.
  11. 11. ion noun a positively or negatively charged atom
  12. 12. liquid noun,adjective A state of matter that has no fixed shape but that has a definite volume.
  13. 13. matter noun,verb Anything that takes up space and has mass.
  14. 14. molecule noun The smallest physical unit of a substance that can exist independently, consisting of one or more atoms held together by chemical forces.
  15. 15. neutron noun An elementary particle with 0 charge and mass about equal to a proton; enters into the structure of the atomic nucleus.
  16. 16. nucleus 1. The positively charged center of an atom. 2. The nucleus is in the center of the atom
  17. 17. organic noun,adjectiveObtained from a living thing; Containing carbon
  18. 18. particles noun Very small pieces of matter.
  19. 19. proton noun A stable particle with positive charge equal to the negative charge of an electron.
  20. 20. solid noun,adjective A state of matter that has a definite shape and a definite volume.
  21. 21. solution noun A homogeneous mixture that has dissolved substances.