9. Electrons in Atoms and the Periodic Table

How many valence electrons does an oxygen atom (O) have?

How many valence electrons does a calcium (Ca) atom have?

How many valence electrons does aluminum (Al) have?

How many valence electrons does a neutral carbon atom have?

How many valence electrons does magnesium (Mg) have in its ground-state electron configuration?

Lithium (Li) is in Group 1 of the periodic table. How many valence electrons does lithium have?

How many valence electrons does a neutral fluorine atom have?

How many valence electrons does a bromine (Br) atom have?

For a main-group element, how can you determine the number of valence electrons using the periodic table?

Which of the following elements has only one valence electron (based on its main-group position in the periodic table)?

How many valence electrons does an oxygen atom have?

How many valence (outer-shell) electrons does the element carbon (C) have?

How many valence electrons does sulfur (S) have?

How many valence electrons are in a neutral atom of phosphorus (P)?

In a neutral silicon atom (Si), how many valence electrons are in its outermost energy level?