The discovery and isolation of radium in uranium ore (pitchblende) by Marie Curie sparked the development of uranium mining to extract the radium, which was used to make glow-in-the-dark paints for clock and aircraft dials. This left a prodigious quantity of uranium as a waste product, since it takes three tonnes of uranium to extract one gram of radium. This waste product was diverted to the glazing industry, making uranium glazes very inexpensive and abundant. Besides the pottery glazes, uranium tile glazes accounted for the bulk of the use, including common bathroom and kitchen tiles which can be produced in green, yellow, mauve, black, blue, red and other colors.
Who isolated radium in uranium ore?
Marie Curie

On 18 June 1953, the monarchy was abolished and the Republic of Egypt declared, with Naguib as its first president. According to Aburish, after assuming power, Nasser and the Free Officers expected to become the "guardians of the people's interests" against the monarchy and the pasha class while leaving the day-to-day tasks of government to civilians. They asked former prime minister Ali Maher to accept reappointment to his previous position, and to form an all-civilian cabinet. The Free Officers then governed as the Revolutionary Command Council (RCC) with Naguib as chairman and Nasser as vice-chairman. Relations between the RCC and Maher grew tense, however, as the latter viewed many of Nasser's schemesagrarian reform, abolition of the monarchy, reorganization of political partiesas too radical, culminating in Maher's resignation on 7 September. Naguib assumed the additional role of prime minister, and Nasser that of deputy prime minister. In September, the Agrarian Reform Law was put into effect. In Nasser's eyes, this law gave the RCC its own identity and transformed the coup into a revolution.
Who was the first president of the Republic of Egypt?
Naguib

On 9 March 2016, The Sun's front page proclaimed that Queen Elizabeth II was backing "Brexit", a common term for a British withdrawal from the European Union. It claimed that in 2011 at Windsor Castle, while having lunch with Deputy Prime Minister Nick Clegg, the monarch criticised the union. Clegg denied that the Queen made such a statement, and a Buckingham Palace spokesperson confirmed that a complaint had been made to the Independent Press Standards Organisation over a breach of guidelines relating to accuracy.
Who refuted the statement that the Queen was critical of the European Union?
Deputy Prime Minister Nick Clegg