Mathematics, 08.01.2021 16:20 angelhusted213

ᶦᵐ ʲᵘˢᵗ ᵖᵘᵗᵗᶦⁿᵍ ᵃⁿ ᵃᶜᵃᵈᵉᵐᶦᶜ ᵠᵘᵉˢᵗᶦᵒⁿ ᶠᶦʳˢᵗ ˢᵒ ᶦᵗ ᵈᵒᵉˢⁿᵗ ᵍᵉᵗ ᵗᵃᵏᵉⁿ ᵈᵒʷⁿ ᵃⁿʸᵒⁿᵉ ʷᵃⁿⁿᵃ ᵗᵃˡᵏ ᵗʰᵒᵘᵍʰˀ
An element that is unstable and decays of its own accord is .

a metal
a nonmetal
a rare earth element
a radioactive substance

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ᶦᵐ ʲᵘˢᵗ ᵖᵘᵗᵗᶦⁿᵍ ᵃⁿ ᵃᶜᵃᵈᵉᵐᶦᶜ ᵠᵘᵉˢᵗᶦᵒⁿ ᶠᶦʳˢᵗ ˢᵒ ᶦᵗ ᵈᵒᵉˢⁿᵗ ᵍᵉᵗ ᵗᵃᵏᵉⁿ ᵈᵒʷⁿ ᵃⁿʸᵒⁿᵉ ʷᵃⁿⁿᵃ ᵗᵃˡᵏ ᵗʰᵒᵘᵍʰˀ

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