How do you use the periodic table to determine the number of valence electrons?

Answer 1

The rows identify the electrons from 1 - 8. You must ignore transition metals for this to work.

Additionally, you can use the column (again, ignoring transition metals) to find the number of orbits in Bohr-Rutherford diagram.

Hope this helps :)

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Answer 2

Natalie Anton

To determine the number of valence electrons using the periodic table, you look at the group number of the element. Elements in the same group have the same number of valence electrons. For example, elements in Group 1 have 1 valence electron, Group 2 have 2 valence electrons, Group 13 have 3 valence electrons, and so on. For transition metals and inner transition metals, the number of valence electrons can vary, but it's often determined by the electron configuration.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.