Examlex
Selenium has atomic number 34.In its ground state,how many electrons are in its n = 2 shell?
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A federal health insurance program in the United States primarily for people aged 65 and over, as well as for some younger people with disabilities.
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A social health care program for families and individuals with low income and resources in the United States.
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A series of programs, public work projects, financial reforms, and regulations enacted by President Franklin D. Roosevelt in the 1930s to respond to the Great Depression.
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