Unit 2 - Periodic Table & Atomic Structure

In this unit we will begin looking at the organization of the periodic table and the information within it. We will also look at the historical development of the model of the atom and the experiments that helped us learn more about subatomic particles. In the lab, we will use the law of definite proportions and the law of definite composition to determine a newly formed compound in a chemical reaction. The following lab will be to look at how atomic masses are calculated for an element using the abundance of different isotopes. Finally, we will look at nuclear chemistry and learn about radioactive decay and other types of nuclear reactions.

We will start by defining and determining the following information:

• • atomic #s

  • atomic mass

  • # protons, neutrons, electrons

  • isotopes

Learning objectives:

• • Name and identify the 4 main groups on the periodic table - metals, nonmetals, metalloids, noble gases. List some general properties of each group.

  • Describe the subatomic particles and their arrangement in our current model of the atom.

  • Describe the development of the atomic model over time and the contributions made by Dalton, Thompson, Rutherford, Bohr, and Chadwick. Explain the significance of the gold foil experiment especially!

  • Identify and calculate the different between #protons, neutrons and electrons in different ions and isotopes of an element.

  • Calculate the average atomic mass for an element when given different percentages of isotopes for that element.

  • Explain the laws of definite proportions, multiple proportions, and the law of conservation of matter and know how they are calculated and applied in the lab.

  • Calculate the half-life of a radioactive isotope using given formulas.

  • Complete nuclear equations.

VIDEOS FOR REVIEW:

Radioactive Dating (This one is looking at carbon dating):

Radioactive Decay Video by Bozeman Science:

A faster explanation: Crash Course Chemistry