which of the following lewis diagrams could represent an ion formed from an element in group 17 of the…

which of the following lewis diagrams could represent an ion formed from an element in group 17 of the periodic table? choose 1 answer: a :x: - b :x: + c :x: 2-

which of the following lewis diagrams could represent an ion formed from an element in group 17 of the periodic table? choose 1 answer: a :x: - b :x: + c :x: 2-

Answer

Explanation:

Step1: Recall group 17 element properties

Elements in group 17 have 7 valence - electrons. They tend to gain 1 electron to achieve a stable octet configuration and form an anion with a charge of - 1.

Step2: Analyze each Lewis - diagram

  • Option A: The ion has a - 1 charge and 8 valence electrons (represented by the dots around the X), which is consistent with a group 17 element gaining 1 electron.
  • Option B: The ion has a + 1 charge, which is not typical for a group 17 element as they gain electrons to form anions.
  • Option C: The ion has a 2 - charge, which is not typical for a group 17 element as they gain only 1 electron to form anions.

Answer:

A. $\left[\begin{array}{ccc}\cdot\cdot&\text{X}&\cdot\cdot\\cdot&\cdot&\cdot\end{array}\right]^{-}$