Re-order each list of elements in the table below, if necessary, so that the elements are listed in order of decreasing electronegativity.

F, O, B

O, Se, Te

Explanation:

As you go across the periods, electronegativity increases. As you go down a group, the electronegativity decreases. This means that the elements on the upper right side of the periodic table are the most electronegative elements, and the elements on the left lower side of the periodic table are the least electronegative.

:)

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.