what is the oxidation number of bromine in babr2? +1 0 -1 -7

Explanation:

Step1: Recall oxidation - number rules

The sum of oxidation numbers in a neutral compound is 0. Barium (Ba) is in Group 2 and has an oxidation number of +2 in compounds.

Step2: Let the oxidation number of Br be (x)

For (BaBr_2), we have the equation (+ 2+2x = 0) (since there are 2 Br atoms).

Step3: Solve the equation for (x)

[ \begin{align*} 2 + 2x&=0\ 2x&=- 2\ x&=-1 \end{align*} ]

Answer:

-1