First 20 Elements Of The Periodic Table: The atomic number and symbols are important in chemistry. The atomic number of elements gives us an idea about the atomic structure of elements ...

Give each student a copy of the periodic table of the elements, the periodic table of elements 1–20, and the activity sheet. Students will use the periodic table of elements 1–20, along with the ...

Have students look at the Periodic table of the elements 1–20 they used in lesson 2 to answer the following question: How do you know this model is an oxygen atom? If students can’t answer this ...