Here is a question about this article: Hydrogen has three naturally occurring isotopes, denoted 1H, 2H and 3H. Other, highly unstable nuclei (4H to 7H) have been synthesized in the laboratory but not observed in nature.
What is the answer to this question: Which isotopes have unstable nuclei?
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So... 4H to 7H


Here is a question about this article: Increasing state control over the oil sector, the RCC began a program of nationalization, starting with the expropriation of British Petroleum's share of the British Petroleum-N.B. Hunt Sahir Field in December 1971. In September 1973, it was announced that all foreign oil producers active in Libya were to be nationalized. For Gaddafi, this was an important step towards socialism. It proved an economic success; while gross domestic product had been $3.8 billion in 1969, it had risen to $13.7 billion in 1974, and $24.5 billion in 1979. In turn, the Libyans' standard of life greatly improved over the first decade of Gaddafi's administration, and by 1979 the average per-capita income was at $8,170, up from $40 in 1951; this was above the average of many industrialized countries like Italy and the U.K.
What is the answer to this question: In 1979, how much did the average per capita income change for Libyans?
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So... by 1979 the average per-capita income was at $8,170, up from $40 in 1951


Here is a question about this article: With such a high percentage of children working, the rising of illiteracy, and the lack of a formal education became a widespread issue for many children who worked to provide for their families. Due to this problematic trend, many parents developed a change of opinion when deciding whether or not to send their children to work. Other factors that lead to the decline of child labour included financial changes in the economy, changes in the development of technology, raised wages, and continuous regulations on factory legislation.
What is the answer to this question: What are the reasons that lead to a decline of child labour?
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So...
financial changes in the economy, changes in the development of technology, raised wages, and continuous regulations on factory legislation