To find out which elements have the same number of valence electrons as oxygen, you can look at the periodic table. Oxygen is located in Group 16 (also known as Group VIA) of the periodic table.
Elements in Group 16 have 6 valence electrons, which is the same as oxygen. These elements include sulfur (S), selenium (Se), tellurium (Te), and polonium (Po). They all have six electrons in their outermost shell.
It's important to note that the number of valence electrons is the same for elements within the same group or column of the periodic table. So, for elements in Group 16, the valence electron count is consistent.