The relative abundance of 79Br and 81Br is _ and _ respectively

Explanation

This is a factual recall question.Bromine is a reddish-brown liquid belonging to group VII (halogens) of the periodic table and exists as two common isotopes in roughly equal proportions. One isotope of bromine has an atomic mass of 78.92amu and a relative abundance of 50.69%. The other major isotope of bromine has an atomic mass of 80.92amu and a relative abundance of 49.31%..The relative abundance of the isotopes 79Br and 81Br, which are isotopes of bromine (Br), can vary depending on the source of bromine. However, as of my knowledge cutoff in September 2021, the approximate relative abundances of these isotopes in nature are as follows:- 79Br: Approximately 50.69% relative abundance- 81Br: Approximately 49.31% relative abundancePlease note that these values are approximate and can vary slightly in different sources of bromine. For the most accurate and up-to-date information, it's recommended to consult reliable scientific sources or databases.