GED Science Practice Test 7
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Avg score: 25% Most missed: “How many valence electrons does a carbon atom (symbol C) have?”

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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GED Science Practice Test 7
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4 Questions

1. How many valence electrons does a carbon atom (symbol C) have?
2. Which of the following statements is true?
3. Which of the following statements about sodium (symbol Na) is NOT true?
4. Which of the following elements is the least chemically reactive?