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The other two types of decay are seen in all of the elements.Table of modes of radioactive decay: Radionuclides can undergo a number of different reactions, summarized here.

She and her husband, Pierre, soon discovered two new radioactive elements, which she named polonium, after her native land of Poland, and radium, because it radiates.

These two new elements filled holes in the periodic table and displayed much higher levels of radioactivity than uranium.

Marie’s radioactive fingerprints on some pages of her notebooks can still expose film.

Marie suffered from radiation-induced lesions and died of leukemia, likely caused by radiation.

Radioactive decay occurs when an unstable atomic nucleus loses energy by emitting energy in the form of emitted particles or electromagnetic waves, called radiation.

Isotopes are atoms of the same element (thereby having the same number of protons) which differ in the number of neutrons in their nucleus.

This means that rays carry energy, but pitchblende emits them continuously without any energy input.

This is an apparent violation of the law of conservation of energy.

She was active in research almost until her death in 1934.

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