Dmitri Mendeleev was a Russian scientist born in 1834 who is considered the father of the periodic table. He arranged the elements in order of atomic mass, noticing patterns that allowed him to predict properties of undiscovered elements. His periodic table was published in 1869 and proved remarkably accurate, with three predicted elements discovered shortly after. Mendeleev made many contributions in chemistry and is honored by having the radioactive element with atomic number 101 named after him as Mendelevium. He died in 1907 at age 73.

1. SUBMITTED BY
ATHIRA.M
PHYSICAL SCIENCE

2. Dmitri Mendeleev(1834 - 1907)

3. Biography..
Dmitri Ivanovich Mendeleev was his full
name.
Born on February 8, 1834
Born in Tobolsk, Siberia, Russia
Parents were Ivan Pavlovich Mendeleev
and Maria Dmitrievna Kornilieva
He was a Russian Scientist
Father of the Periodic Table
Mendeleev died on February 2, 1907

4. Education..
Studied at St. Petersburg and graduated
in 1856.
After graduating from St. Petersburg he
was appointed to a professor.
Three years after being appointed to a
professor he succeeded to the chairman
in the University.
He was considered one of the greatest
teachers of his time.

5. Awards..
Davy Medal from Royal Society of
England in 1882.
Domindov Prize for his book "Organic
Chemistry”.
Copley Medal from the Royal Society of
England in 1905.

6. Honors..
In 1893, he was appointed the Director of
the Bureau of Weights and Measures.
In 1905 Dmitri Mendeleev was elected a
member of the Royal Swedish Academy of
Sciences.
The crater Mendeleev on the Moon, as
well as an element number 101, the
radioactive Mendelevium, are named
after him.

7. Books..
Mendeleev wrote and published a 2
volume Chemistry book entitled
“Principles of Chemistry”.
This was very important because there
were no chemistry textbooks at the time.

8. Mendeleev is the creator of the first version
of the Periodic Table of Elements. Using
the table, he predicted the properties of
elements yet to be discovered.
He investigated the heat expansion of
liquids, and devised a formula similar to
Gay-Lussac's law of the uniformity of the
expansion of gases.
Contributions..

9. He investigated the composition of oil
fields, and helped to found the first oil
refinery in Russia.
He formulated new state standards for
the production of vodka.
He invented pyro collodion, a kind of
smokeless powder based on nitrocellulose.

10.  To begin his task,
Mendeleev wrote facts
about the elements on
individual paper cards.
 On these cards,
Mendeleev wrote
information such as the
elements' melting
points, densities, colors,
atomic masses and
bonding powers.

11.  Mendeleev noticed that patterns appeared when
the elements were arranged in order of
increasing atomic mass.
 As he laid out cards, each element had properties
similar to the elements above and below it.
 Mendeleev's table was not perfect, however.
Arranging the elements by increasing atomic
mass left three blank spaces in the table.

12.  Mendeleev boldly proposed
that these blank spaces
would be filled by
elements that had not yet
been discovered.
 Mendeleev was even able to
use the patterns in his
table to predict the
properties of these
undiscovered elements
 This first periodic table of
the elements was published
in 1869.

13.  Within 16 years of Mendeleev's
first periodic table, chemists had
discovered all three of the
missing elements (scandium,
gallium, and germanium), and
their properties were very close
to what Mendeleev had
predicted.
 So they call him the father of the
periodic table, and his work gave
rise to another kind of label. It’s
the name for element number
101,in honor of this man they call
it Mendelevium.

14. State: solid
weight: 258
Melting point: 827 oC,1100 K
Electrons: 101
Protons: 101
isotope: 157
Electron shells: 2,8,18,32,31,8,2
Electron configuration: [Rn] 5f12 7s2
MENDELEVIUM

15.  Mendeleev died on
February 2 1907 at
the age of 73