User talk:103.40.198.81

May 2020
Please refrain from making unconstructive edits to Wikipedia, as you did at Mercury(II) oxide. Your edits appear to constitute vandalism and have been reverted. If you would like to experiment, please use the sandbox. Repeated vandalism may result in the loss of editing privileges. Thank you. TheImaCow (talk) 13:16, 15 May 2020 (UTC)