Q: What kind of metals have perplexing patterns of electron distribution that don’t always follow the electron filling rules?


Read this paragraph and choose the correct option from the provided answers:

The transition metals are an interesting and challenging group of elements. They have perplexing patterns of electron distribution that don’t always follow the electron filling rules. Predicting how they will form ions is also not always obvious.

 Choices:

- solution

- transformation

- variating

- transition


A:
transition