Which of the following is true about the compound mgbr2? question 2 options: a magnesium atom gained 2 electrons, while two bromine atoms each lost 1 electron. a magnesium atom lost 2 electrons, while a bromine atom gained 2 electrons. a bromine atom lost 2 electrons, while a magnesium atom gained 2 electrons. a magnesium atom lost 2 electrons, while two bromine atoms each gained 1 electron.