Question

question 5 3 pts which of the following drawings represents an argon atom, ar? (a) 17+ 18− (b) 18+ 18− (c) 19+ 18− (d) 20+ 18− (c) (a) (b) (d)

Explanation:

Step1: Recall atomic number of Argon

The atomic number of Argon (Ar) is 18. In a neutral atom, the number of protons is equal to the number of electrons. The number of protons is represented by the positive charge in the nucleus and the number of electrons by the negative - charge outside the nucleus.

Step2: Analyze each option

• Option (a): Has 17 protons and 18 electrons, so it is not Argon.
• Option (b): Has 18 protons and 18 electrons, which is consistent with a neutral Argon atom.
• Option (c): Has 19 protons and 18 electrons, so it is not Argon.
• Option (d): Has 20 protons and 18 electrons, so it is not Argon.

Answer:

B. Option (b)