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

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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