Marie Curie was a Polish physicist and chemist born in 1867 who made groundbreaking discoveries in the field of radioactivity. She coined the term radioactivity and discovered the radioactive elements polonium and radium. Curie received numerous honors, including being the first person to receive two Nobel Prizes, for her scientific achievements. Radioactivity is the process by which unstable atomic nuclei emit radiation as they decay into more stable forms, and the rates of radioactive decay are expressed in half-lives, the time it takes for half of a radioactive substance to decay.

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3. Marie Curie was born on November 7, 1867 – died on July o4,
1934. Curie was a Polish physicist and chemist, Nobel laureate.
Curie coined the term radioactivity.
She discovered polonium and radium radioactive
elements.Curium periodic table element was named in honor of
both Marie and Pierre Curie.She predicted that radiation come
from inside of atom but not as a result of interaction between
molecules.
Marie curie got number of awards and medals in the field of
physics and chemistry. The medals she got includes first Nobel
Prize in the field of physics in 1903, Davy medal from Royal
society in the year of 1903, Matteucci Medal in the year of 1904,
Elliott Cresson Medal in the year of 1909, second Nobel Prize in
Chemistry in the year of 1911 and Franklin Medal of the
American Philosophical Society in the year of 1921

4. It is the method by which a nucleus of an
unstable atom loses energy by emitting particles
of ionizing radiation. The material which
spontaneously emits radiation particles like alpha
particles, beta particles, and gamma rays, is
considered as radioactive. Radioactive decay
rates are normally stated in terms of their half-
lives.
Half-lives of radioactive elements are nothing but
the time that it takes for one half of the atoms of
that substance to disintegrate into another
nuclear form. These can range from mere
fractions of a second, to many billions of years.

5. Actinium radioactive element half-live is
227Ac – 21.773 years
Antimony radioactive element half-live is
125Sb – 2.77 years
The different types of radioactivity lead to different
decay paths which transmute the nuclei into other
chemical elements. Radioactive decay has been put to
use in the technique of radioisotopic labeling, which
is used to track the passage of a chemical substance
through a complex system.

6. Polonium isotopes
Polonium element has 33 isotopes. It starts
from 186Po to 227Po.
Examples
188Po
189Po
190Po
191Po etc

7. Radium has 35 unstable isotopes. It starts
from 201Ra to 235Ra
Examples
202Ra
203Ra
204Ra
205Ra etc

8. Curium element has 21 radioactive isotopes
ranging from 232Cm to 252Cm
Examples
243Cm
244Cm
245Cm
246Cm etc

9. Study more about other famous woman
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Get more details about radioactive elements
and other periodic table elements from
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eriodictable.html