During this activity, students will familiarize themselves with the structure and organization of the periodic table. Students will have a choice of working independently or with a peer as they search through the periodic table, snooping for elements with particular properties.
|5th Grade||5-PS1-1 – Develop a model to describe that matter is made of particles too small to be seen.|
|5-PS1-3 – Make observations and measurements to identify materials based on their properties.|
|Middle School||MS-PS1-1 – Develop models to describe the atomic composition of simple molecules and extended structures.|
Students will be able to describe the structure and organization of the periodic table.
Students will be able to identify elements based on their properties.
• Building Blocks of Chemistry series, specifically Chemical Elements
• Periodic Table (1 per student)
• Colored pencils or crayons (10 colors per student)
• Snooping For Elusive Elements Worksheet (1 per student)
• Snooping For Elusive Elements Worksheet Answer Key
Pass out copies of the periodic table and use the example on page 16 and 17 of the Building Blocks of Chemistry: Chemical Elements text to review each of the symbols found on the periodic table and what they represent.
a. Atomic Number – the number of protons in the nucleus (center) of an atom of a chemical element. The atomic number is used in describing an element. All atoms of the same chemical element have the same number of protons.
b. Group number – represents elements with the same properties and form compounds in similar ways, organized into columns
c. Element symbol – usually one or two letters used to represent a specific element; many symbols are the first letter or two of the element’s name
d. Period number – represents the number of electron shells in a given element; elements in the same row belong to the same period and have the same period number
e. Atomic mass – the amount of matter in an atom; the more protons and neutrons, the greater the atomic mass
f. Class – represents elements with similar physical and chemical properties, often organized and represented by color
Explain that students will have a choice of working independently or with a self-selected peer to color-code their periodic table to show the different classes of elements. Students should create a key to stay organized. Classes to include:
a.Alkali metals – all the elements of group 1 except hydrogen: lithium, sodium, potassium, rubidium, cesium, and francium
b.Alkaline earth metals – all the elements of group 2: beryllium, magnesium, calcium, strontium, barium, and radium
c. Transition metals – almost all the metals from groups 3 through 12
d. Lanthanide metals – located in the first row at the bottom of the periodic table
e. Actinide metals – located in the second row at the bottom of the periodic table
f. Other metals – located to the right of the transition metals: aluminum, gallium, indium, tin, thallium, lead, bismuth, nihonium, flerovium, muscovium, and livermorium
g. Metalloids – has properties of both metals and nonmetals: boron, silicon, germanium, arsenic, antimony, terrarium, and polonium
h. Nonmetals – hydrogen, carbon, nitrogen, oxygen, phosphorus, sulfur, and selenium
i. Noble gases – make up group 18: helium, neon, argon, krypton, xenon, radon, and oganesson
j. Halogens – make up group 17: fluorine, chlorine, bromine, iodine, astatine, and tennessine