Use the following information to help answer Questions below. The periodic table organizes elements based on their atomic structure. The periodic table has rows (called periods) and columns (called groups). The group tells you how many valence electrons the element possesses, whereas the period tells you how many energy levels the atom has. Here is a simplified period table showing the first three periods of the Group A elements:
Use the following information to help answer Questions below. The periodic table organizes elements based on their atomic structure. The periodic table has rows (called periods) and columns (called groups). The group tells you how many valence electrons the element possesses, whereas the period tells you how many energy levels the atom has.
Here is a simplified period table showing the first three periods of the Group A elements:
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