सुरक्षा माचिस की तीली के शीर्ष पर मुख्य रूप से किस रासायनिक तत्व का उपयोग किया जाता है?

Which metallic element is commonly referred to by the historical name 'Quicksilver'?

'Quicksilver' is another common name for which element?

Which of the following statements does NOT describe a chemical compound?