Chapter 4 – Elements and the Periodic Table

The vertical columns are called _____, also known as a _____ . The elements in the same group have the same _____. For example, the elements in Group 1 react _____ with water. While the elements in Group 2 react _____ with water. Atomic mass is: Here, look at the periodic table: Inside each square are 4 important details: atomic number ... ................
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