1. Chemistry of Life
The Nature of Matter

2. Atoms are the basic building blocks of all things- living or otherwise

3. Atoms are the basic building blocks of all things- living or otherwise
Incredibly small- smallest piece of a substance and still have a substance

4. Made of three subatomic particles
Atoms are the basic building blocks of all things- living or otherwise
Incredibly small- smallest piece of a substance and still have a substance
Made of three subatomic particles
Proton (+)
Neutron (no charge)
Electron (-)

5. Protons and neutrons make up the nucleus and both have mass
Electrons are in a cloud moving about the outer region of the atom- have insignificant mass

6. Isotopes are different forms of the same element
Have same # of protons & electrons
Different # of neutrons

7. Some isotopes are radioactive
Unstable nucleus that breaks down at a constant rate

8. Useful in research as they can be “traced” or detected by equipment
Date fossils or rocks (helps determine geologic age)
Radiation from certain isotopes can treat cancer

9. Compound = substance formed by the chemical combination of 2 or more elements
Ex: water H2O
(hydrogen & oxygen)
salt NaCl
(sodium & Chloride)

10. Atom is the smallest chunk of element (oxygen)
** Atoms are to elements as molecules are to compounds**
Atom is the smallest chunk of element (oxygen)
Molecule is smallest chunk of a compound (water- H2O)

11. Chemical Bonds: Covalent Electrons are shared between atoms
Forms a molecule

12. 2. Ionic Electrons are transferred between atoms
Forms opposite charges that attract

13. Chemical Bonds: 3. Hydrogen Weak attraction between hydrogen (+)
Happens in water, DNA

14. Chemical Bonds: 4. Van der Waals forces
weak attraction between any + and – area of 2 neighboring atoms
Larger molecules
Weakest of all bonds

15. Chemical Reaction-
-molecules are destroyed and created by breaking and forming chemical bonds

16. Chemical Reaction-
atoms are neither created nor destroyed in a chemical reaction

17. Chemical Reaction-
there must be the same number of each type of atom on the product and reactant sides of the arrow

18. CH4 + 2o2 CO2 + 2H2O Reactants Products Balanced? C H O Reactants

19. CH4 + 2o2 CO2 + 2H2O Reactants Products Balanced? 1 C Yes 4 H 4 O 4O