Atoms, Elements & the Periodic Table. Interpret information on a periodic table to understand how elements are grouped. What do you remember from 6 th grade?. The periodic table shows approximately 120 known elements Elements can be classified as metals, nonmetals, and metalloids
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Interpret information on a periodic table to understand how elements are grouped.
Increasing atomic number/mass
1 valence electron
Reacts violently with Oxygen under the right conditions.