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Potassium 40 is an isotope with 19 protons (and electrons) and 21 neutrons. Potassium 40 accounts for around 0.012% of potassium and is fairly stable (half life of 1.25 billion years).
Potassium 40 is an isotope with 19 protons (and electrons) and 21 neutrons. Potassium 40 accounts for around 0.012% of potassium and is fairly stable (half life of 1.25 billion years).
Potassium 40 is an isotope with 19 protons (and electrons) and 21 neutrons. Potassium 40 accounts for around 0.012% of potassium and is fairly stable (half life of 1.25 billion years).
Potassium 40 is an isotope with 19 protons (and electrons) and 21 neutrons. Potassium 40 accounts for around 0.012% of potassium and is fairly stable (half life of 1.25 billion years).
Wiki User
∙ 11y ago
Wiki User
∙ 11y agoThe term "half life" refers to the amount of time a radioactive substance takes to convert half its mass to another form. After one half life, 50% of the original substance (potassium-40 in this case) would remain. After a second half-life, half of that would remain. Half of 50% is 25%, or one fourth of the original mass.
Wiki User
∙ 8y agoThe half life of potassium 40 is 1.3 billion years.
Wiki User
∙ 14y ago1.25*109 yr, at that time half of 50 atoms (= 50-25= (1/2)*50= 25!) is gone.
Wiki User
∙ 11y agoPotassium 40 is an isotope with 19 protons (and electrons) and 21 neutrons. Potassium 40 accounts for around 0.012% of potassium and is fairly stable (half life of 1.25 billion years).
loloalmarar
b) the original amount of the element was 80g, How much would remain after 56 years?
Wiki User
∙ 15y ago1.25 billion years
Wiki User
∙ 14y agoApproximately 1,248,000,000 years
Wiki User
∙ 13y agoIt is 0.012 years.
Wiki User
∙ 11y ago1/8 th of the original amount.
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