Pre-Lab 15 A: Periodic Table

Purpose

• Virtually all the matter you see is made up of combinations of elements. Scientists know of 118 different elements, of which about 90 occur naturally.

• Each element has its own unique kind of atom.

• The periodic table is a chart that shows all of the elements in order of increasing atomic number.

Key Question

• How is the periodic table organized?

Background

• Define:– Period– Group – Periodicity

Drawingdraw this:

ProcedureEvery element is given a symbol of one or two letters.

For example, the symbol for hydrogen is a capital letter H. The symbol for lithium is two letters, Li.

Each element also has a unique number called the atomic number.

The periodic table is a chart that shows the elements in an arrangement that helps us recognize groups of elements with similar properties.

Your drawing shows the shape of the periodic table and the first few elements in sequence from left to right.

The elements are arranged from lowest to highest atomic number.

Section1:

There is a periodic table on page 88 of your lab book

Using the this table as a guide, build the periodic table out of the periodic table tiles.

The only tile you should use yellow-side up is the hydrogen tile.

The colors will show a pattern when you are finished.

There is a tricky part near the bottom of the table. The table breaks off between element 56 (Ba) and element 71 (Lu), and fills in the first of two long rows underneath the main part of the chart.

You must have your chart checked and signed by the teacher when completed

Post Lab 15A: periodic table

Purpose

• Virtually all the matter you see is made up of combinations of elements. Scientists know of 118 different elements, of which about 90 occur naturally.

• Each element has its own unique kind of atom.

• The periodic table is a chart that shows all of the elements in order of increasing atomic number.

Key Question

• How is the periodic table organized?

Background

• Define:– Period– Group – periodicity

SECTION 2:

• a. Which elements are in group 1?

• b. Which elements are in group 8?

• c. Name three transition metals.

• d. To which group does chlorine belong? What other elements are in that group?

• e. Which elements are in the 2nd period?

Section 3:• a. Each period of the periodic table contains

only a certain number of elements. What does this have to do with the structure of the atom?

• b. Which group of the periodic table above contains the element argon?

• What characteristic do the elements in this group share?

• c. Which group contains the element carbon?

• What characteristic do the elements in this group share?