Retired science teacher fails to answer 'easy' chemistry question on Who Wants to Be a Millionaire?

Retired science teacher Pat Lucas, from Lincoln, left viewers in shock after she got a basic chemistry question wrong on last night's episode of Who Wants to Be a Millionaire? https://www.dailymail.co.uk/femail/article-8717667/Retired-science-teacher-fails-answer-easy-chemistry-question-Wants-Millionaire.html?ns_mchannel=rss&ns_campaign=1490&ito=1490