the isotope of hydrogen that contains two neutrons.
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Subject:
(also called more economically developed countries, abbreviated as MEDCs) countries that are...
Subject:
low- and middle income countries in which most people have a lower standard of living than...
Subject:
(also called less economically developed countries, abbreviated as LEDCs) countries that are low...
Subject:
the rise in social and economic advancement to achieve higher standards of living and quality of...