Lena Ciric, UCL Living under lockdown and the uncertainty that COVID-19 has brought to our lives has been difficult for everyone. We have all welcomed the opportunity to return to a more normal way of life. But a resurgence in cases after the easing of lockdown in many countries shows us that this pandemic is by no means over. We need to remember that now is not the time to relax and take risks. Governments around the world have taken different approaches to responding to the pandemic, but social distancing measures have been a common factor for all. That's because it's one of the most powerful tools we have in preventing the transmission of this disease. The fewer people we interact with, the lower the chances that the virus will spread. This has been a successful strategy to lower numbers of cases. In June and July it was evident that the numbers of new cases were down significantly in Europe, so governments started to relax some of the lockdown measures that had been put i...
Structure of BrF3 Molecule The central atom Br has seven electrons in the valence shell. Three of these will form electron-pair bonds with three fluorine atoms leaving behind four electrons. Thus, there are three bond pairs and two lone pairs. According to VSEPR theory, these will occupy the corners of a trigonal bipyramid. The two lone pairs will occupy the equatorial positions to minimise lone pair -lone pair and the bond pair -lone pair repulsions which are greater than the bond pair-bond pair repulsions. In addition, the axial fluorine atoms will be bent towards the equatorial fluorine in order to minimise the lone-pair lone-pair repulsions. The shape would be that of a slightly bent T.