The correct answer is A. 17 2, 8, 7.

Here's why:

1. The number of protons in an atom defines the atomic number, and thus, the type of element. Chlorine has an atomic number of 17, which means it has 17 protons. So, options B and D can be eliminated because they suggest that chlorine has 18 protons.

2. The electron configuration of an atom represents the distribution of electrons in atomic orbitals. For chlorine, the electron configuration is 2, 8, 7. This means there are 2 electrons in the first energy level (K shell), 8 in the second (L shell), and 7 in the third (M shell). So, option C can be eliminated because it suggests an incorrect electron configuration for chlorine.

Therefore, the correct answer is A. 17 2, 8, 7.

Question

The correct answer is A. 17 2, 8, 7.

Here's why:

1. The number of protons in an atom defines the atomic number, and thus, the type of element. Chlorine has an atomic number of 17, which means it has 17 protons. So, options B and D can be eliminated because they suggest that chlorine has 18 protons.

2. The electron configuration of an atom represents the distribution of electrons in atomic orbitals. For chlorine, the electron configuration is 2, 8, 7. This means there are 2 electrons in the first energy level (K shell), 8 in the second (L shell), and 7 in the third (M shell). So, option C can be eliminated because it suggests an incorrect electron configuration for chlorine.

Therefore, the correct answer is A. 17 2, 8, 7.

Knowee AI · Accepted Answer

The correct answer is A. 17 2, 8, 7.

Here's why:

1. The number of protons in an atom defines the atomic number, and thus, the type of element. Chlorine has an atomic number of 17, which means it has 17 protons. So, options B and D can be eliminated because they suggest that chlorine has 18 protons.

2. The electron configuration of an atom represents the distribution of electrons in atomic orbitals. For chlorine, the electron configuration is 2, 8, 7. This means there are 2 electrons in the first energy level (K shell), 8 in the second (L shell), and 7 in the third (M shell). So, option C can be eliminated because it suggests an incorrect electron configuration for chlorine.

Therefore, the correct answer is A. 17 2, 8, 7.

The correct number of protons and the electron configuration for chlorine isnumber of protons electron configurationA. 17 2, 8, 7B. 17 2, 8, 8C. 18 2, 8, 7D. 18 2, 8, 8

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