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The 4n + 1 decay chain of neptunium-237, commonly called the "neptunium series" Twenty-four neptunium radioisotopes have been characterized, with the most stable being 237 Np with a half-life of 2.14 million years, 236 Np with a half-life of 154,000 years, and 235 Np with a half-life of 396.1 days.
Edwin Mattison McMillan (September 18, 1907 – September 7, 1991) was an American physicist credited with being the first to produce a transuranium element, neptunium.For this, he shared the 1951 Nobel Prize in Chemistry with Glenn Seaborg.
In their experiments bombarding uranium with deuterons, they observed the creation of neptunium, element 93. But it then underwent beta-decay, forming a new element, plutonium, with 94 protons. Plutonium is fairly stable, but undergoes alpha-decay, which explained the presence of alpha particles coming from neptunium. [22]
The Justice40 Initiative is a policy framework that was launched in 2021 under Executive Order 14008 with the aim of reversing generations of environmental injustice by delivering 40% of the overall benefits of federal investments in climate, clean energy, and sustainable infrastructure to disadvantaged communities. [96]
[7] NEPA required any federal agency planning a project that would affect the environment to submit a report on the likely consequences of its plan. [7] President Nixon signed the bill on New Year's Day 1970, declaring "that the 1970s absolutely must be the years when America pays its debt to the past by reclaiming the purity of its air, its ...
The National Environmental Policy Act (NEPA) is a United States environmental law designed to promote the enhancement of the environment. It created new laws requiring U.S. federal government agencies to evaluate the environmental impacts of their actions and decisions, and it established the President's Council on Environmental Quality (CEQ).
President Joe Biden marked Earth Day by announcing $7 billion in federal grants for residential solar projects serving 900,000-plus households in low- and middle-income communities — while ...
Earth Day is an annual event on April 22 to demonstrate support for environmental protection.First held on April 22, 1970, it now includes a wide range of events coordinated globally by EARTHDAY.ORG (formerly Earth Day Network) [1] including 1 billion people in more than 193 countries.