Question

How did knowing the number of valence electrons in one of the alien elements help to identify it? Explain how the table was used to accomplish this task.

Answer 1

All elements in the same group of the periodic table have the same number of valence electrons. The number of valence electrons always matches the ones place digit of the group number. Knowing the valence electrons of an alien element allows matching it with its group

Step-by-step explanation:

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Answer 2

Knowing the number of valence electrons in one of the alien elements helps in identifying it because the number of valence electrons can help categorize the alien element. Similar elements have the same valence electrons and knowing the category of the element can help further analyze the element.