Study Guide

Unit 2 Lecture Study Guide

1) What are the parts of an atom? Where are the subatomic particles found?

The parts of the atom are the proton, neutron, and electron. The Proton and Neutron are found inside the nucleus of the atom and the electron is found outside the nucleus.

2) How does the Atomic Mass # differ from the Atomic #?

The atomic number is the number of protons in the atom; the atomic mass is the number of neutrons plus protons.

3) What is an isotope? Give an example (show how it is an isotope).

An isotope is an element that can have different numbers of neutrons. An example is Carbon-12, Carbon-13, and Carbon-14.

4) Compare and contrast the 3 basic types of chemical bonds and give an example of each.

|Type |INFO |Example |

|Ionic |Ionic bonds are made up of an anion and a cation. |Na + Cl = NaCl, or salt |

|Covalent |A covalent chemical bond results from the sharing of electrons |H + H = H2 |

| |between two atoms  | |

|Metallic |Because no one atom in a metal sample has a strong hold on its |Zn+ Zn= 2Zn |

| |electrons and shares them with its neighbors, we say that they | |

| |are bonded | |

5) Why is pH important in Anatomy?

In anatomy, pH isn’t actually that important. In Physiology, however, it is essential because the body must maintain a careful pH balance in order from the organs to work.

9) Name the 4 main Organic Molecules in Biochemistry....