Group the elements into pairs that would most likely exhibit similar chemical properties. It does not matter which pair of elements is pair 1, pair 2, or pair 3, so long as the correct elements are paired. Pair 1 Pair 2 Pair 3
1.F 2.K3.P4.As
5.Br 6.Li

Pair 1 : ( F , Br )

Pair 2 : ( Li , K )

Pair 3 : ( P , As )

Step-by-step explanation:

Following the groups (column number ) in the periodic table (since elements that belong to the same group exhibit similar properties ) we can build the following pairs:

Pair 1 : ( F , Br ) → Since both belong to the Halogens group  ( Group number 17)

Pair 2 : ( Li , K ) → Since both belong to the Alkali metals group  ( Group number 1)

Pair 3 : ( P , As ) → Since both belong to the Pnictogens group ( Group number 15)

the simplified form is

step-by-step explanation:

we want to simplify the expression,

let us change the middle bar to a normal division sign to obtain,

we multiply the first fraction by the reciprocal of the second fraction to obtain,

we factor to obtain,

we cancel the common factors to get,

we simplify to get,

the correct answer is b