Complete each statement with the word that makes it true.

The noble gases are the least
of any elements on the periodic table.

The
form acidic compounds with hydrogen.

The halogens are the most reactive among all the
.

The noble gases are the least  reactive  of any elements on the periodic table.

The  halogens   form acidic compounds with hydrogen.

The halogens are the most reactive among all the  nonmetals . ( Make sure to write nonmetals as one word don't space non mental it will be wrong)

Explanation: took test - used the periodic table

the electronic configuration of an atom with eight electrons is 1s²2s²2p⁴. the orbital diagrams are shown in the figure.

as per the hunds rule:

1. electrons tend to avoid being in the same orbital as per as practicable.

2. electrons in different orbitals of the same energy will have their spin parallel.

this can be illustrated from the multiplicity of the orbitals of the atom. as there are four electrons in the p orbital and p orbital has 3 sub-shells. the electrons can be fed in different ways as shown in the figure but the correct orbital diagram will be as per the hunds rule.

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.