Question

Which of the following statements is not true of using electron dot diagrams?

A. The element's group number provides a clue about the number of valence electrons.
B. An element with eight valence electrons is chemically unstable.
C. Dots should be placed one at a time on each side of the chemical symbol.
D. An atom is chemically stable if all dots are paired.

Answer 1

B is the false one. Cause an element with 8 valence electrons is chemically stable. Ex. Argon

Answer 2

The correct answer is the option: B. An element with eight valence electrons is chemically unstable.

Step-by-step explanation:

Hello! Let's solve this!

We will analyze each of the options:

A. The group number of the element provides a clue to the number of valence electrons: it is correct, since it provides the number of valence electrons.

B. An element with eight valence electrons is chemically unstable: this is not correct, since elements with eight electrons in the valence shell cannot react because they already have the last complete shell. Therefore, they are chemically stable.

C. The points must be placed one at a time on each side of the chemical symbol: it is correct, because that is the way to make the point diagram.

D. An atom is chemically stable if all the points are paired: this is correct since this verifies that the point diagram has been done well.

We conclude that the correct answer is the option: B. An element with eight valence electrons is chemically unstable.