Questions: How many VALENCE electrons does a neutral atom of chlorine (CI) have? 17 8 7 18

Transcript text: How many VALENCE electrons does a neutral atom of chlorine (CI) have? 17 8 7 18

Solution

Solution Steps

Step 1: Determine the Atomic Number of Chlorine

Chlorine (Cl) has an atomic number of 17. This means a neutral chlorine atom has 17 electrons.

Step 2: Electron Configuration of Chlorine

The electron configuration of chlorine is: \[ 1s^2 2s^2 2p^6 3s^2 3p^5 \]

Step 3: Identify the Valence Electrons

Valence electrons are the electrons in the outermost shell. For chlorine, the outermost shell is the third shell, which contains: \[ 3s^2 3p^5 \] This gives a total of \(2 + 5 = 7\) valence electrons.

Final Answer

\(\boxed{7}\)

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