eTwinning project The Chemical tree the Presentation by the students from the primary school "Branko Radicevic" Smederevo Serbia

1. Primary school Branko Radicevic, Smederevo, Serbia

2. All eTwinning project participants from different countries will determine their chemical
elements, according a formula and date of birth.
The formula that relates the exact date of birth of a person with a number of the
chemical element is:
where N - is the number of the chemical element in the Periodic Table;
x - day of birth (1 to 31);
y - birth month (1 to 12);
z - the penultimate digit of the year of birth (0 to 9);
u - the last digit of the year of birth (0 to 9).
N =
1200𝑥+10𝑦+𝑧+120𝑢−1210
400
+1

3. Primary school
Branko Radicevic
Sladjana Rankovic The Chemical tree

4. Primary school
Branko Radicevic
Named after "Thule", an ancient name for Scandinavia.
 Thulium is the least abundant of the earth
elements, and is about as rare as silver, gold, or
cadmium.
 The pure metal has a bright, silvery lustre. It is
reasonably stable in air, but the metal must be
protected from moisture. The element is silvery-
grey, soft, malleable, and ductile, and can be cut
with a knife.

5. Primary school
Branko Radicevic
Jana Kostic The Chemical tree

6. Primary school
Branko Radicevic
 Ferum in Latin, Eisen in German, Iron in
English, means power, strength. Iron has
been known since ancient times. It is present
in everyday life. It is dark grаy, reactive
transition metal which is susceptible to
corrosion. Iron is located in the center of the
Earth, in volcanic rocks and in the human
bodies.

7. Primary school
Branko Radicevic
Kristina Spasic The Chemical tree

8. Primary school
Branko Radicevic
 Samarium is a chemical element with symbol Sm and atomic
number 62. It is a moderately hard silvery metal that readily
oxidizes in air. It is a typical member of the lanthanide series,
 The major commercial application of samarium is in
samarium-cobalt magnets, catalysis of chemical reactions,
radioactive dating and an X-ray laser.

9. Primary school
Branko Radicevic
Teodora Katic The Chemical tree

10. Primary school
Branko Radicevic
 Iridis- rainbow, It was named
after its colored compounds. It’s
a silvery white metal, which
when added to other substances
makes they sparkle. It can be
found in touch screens phones
and tablet computers.

11. Primary school
Branko Radicevic
Veljko Maksimovic The Chemical tree

12. Primary school
Branko Radicevic
 Kali- the name comes from a word which refers to the name of
the port in Malaya from which Tin was exported in large
quantity. Tin is too soft, dark silver metal, which melts at a
relatively low temperatures, and it easily converts into a powder
below 13 degrees. This is a very usefull metal because it serves to
protect other metals from corrosion. Tin is a part of Bronze alloy.

13. Primary school
Branko Radicevic
Bogdan Zlatanovic The Chemical tree

14. Primary school
Branko Radicevic
 The other name for Mercury is “Liquid silver”. It was also named after the
messenger of the gods -Mercury. It is a grey, liqid metal, easy to evaporate, toxic
and deadly. It is accumulated in the bodies of animals, particularly fish that swim in
the water wich Mercury pollutes. Mercury attacks the nervous system of those who
eat contaminated fish. Alchemists mistakenly thought that they could use Mercury
to turn the other base metals into gold. Mercury used to be used in mining, dental
fillings and thermometres. Nowadays, it is rarely used because of its toxic effects.

15. Primary school
Branko Radicevic
Staša Banjanin The Chemical tree

16. Primary school
Branko Radicevic
Named after the roman God Mercury, greek God
Hermes
 Mercury was found in Egyptian tombs
that date from 1500BC. China and
Tibet mercury use was thought to
prolong life, heal fractures, and
maintain generally good health,
although it is now known that
exposure to mercury vapour leads to
sertious adverse health effects.

17. Primary school
Branko Radicevic
Jana Radosevic The Chemical tree

18. Primary school
Branko Radicevic
Iridis- rainbow, It was named after its colored compounds. It’s a
silvery white metal, which when added to other substances
makes they sparkle. It can be found in touch screens phones
and tablet computers.

19. Primary school
Branko Radicevic
Kristina Aleksic The Chemical tree

20. Primary school
Branko Radicevic
“ Barus” is latin word that means heavy. It is an
alkali earth metal, very reactive. Barium colours
the flame green, and it is used to make flares and
fireworks.

21. Primary school
Branko Radicevic
Milan Stojanovic The Chemical tree

22. Primary school
Branko Radicevic
 Solid gallium is a blue-gray metal with orthorhombic
crystalline structure; very pure gallium has a stunning silvery
color. Gallium is solid at normal room temperatures, but as
well as mercury, cesium, and rubidium it becomes liquid when
heated slightly. Solid gallium is soft enough to be cut with a
knife. It is stable in air and water; but it reacts with and
dissolves in acids and alkalis.

23. Primary school
Branko Radicevic
Nevena Kojic The Chemical tree

24. Primary school
Branko Radicevic
Mercury metal has many uses. Because of its high density it is used in barometers and
manometers. It is extensively used in thermometers, thanks to its high rate of thermal
expansion that is fairly constant over a wide temperature range. Its Its ease in amalgamating
with gold is used in the recovery of gold from its ores. liquid
Industry uses mercury metal as a electrode in the manufacture of chlorine and sodium
hydroxide by electrolysis of brine. Mercury is still used in some electrical gear, such as
switches and rectifiers, which need to be reliable, and for industrial catalysis. Much less
mercury is now used in consumer batteries and fluorescent lighting, but it has not been
entirely eliminated.

25. Primary school
Branko Radicevic
Marija Vuckovic The Chemical tree

26. Primary school
Branko Radicevic
 “Calx” – means lime, It is very important and
widespread alkaline earth metal, gray, very soft, and
reactive to water and oxygen, biogenic element. Its
compounds can be very strong.

27. Primary school
Branko Radicevic
Dejana Popovic The Chemical tree

28. Primary school
Branko Radicevic
Named after asteroid Palas, a greeks Greek goddess of wisdom, Athena Paladis
 Palladium is found as the free metal associated with platinum and
other platinum group metals
 Palladium is a lustrous silver-white metal. It has a face-centered
cubic crystalline structure, at ordinary temperatures it is strongly
resistant to corrosion in air and to the action of acids. It is attacked
by hot acids, and it dissolves in aqua regia. It forms many
compounds and several complex salts. Palladium has a great ability
to absorb hydrogen

29. Primary school
Branko Radicevic
Milena Ristic The Chemical tree

30. Primary school
Branko Radicevic
Beryllium is a toxic bivalent element, steel gray, strong, light-weight,
primarily used as hardening agent in alloys. Beryllium has one of the
highest melting points of the light metals. It has excellent thermal
conductivity, is nonmagnetic. Beryllium is used as an alloying agent in the
production of beryllium-copper. Beryllium is not an element that is crucial
for humans; in fact it is one of the most toxic chemicals we know. It is a
metal that can be very harmful when humans breathe it in, because it can
damage the lungs and cause pneumonia.

31. Primary school
Branko Radicevic
Vanja Dinic The Chemical tree

32. Primary school
Branko Radicevic
 Tin is a chemical element with symbol Sn (for Latin: stannum)
and atomic number 50. It is a post-transition metal in group 14
of the periodic table. It is obtained chiefly from the mineral
cassiterite, Tin shows a chemical similarity to both of its
neighbors in group 14, germanium and lead
 Tin is the 49th most abundant element and has, with 10 stable
isotopes, the largest number of stable isotopes in the periodic
table, thanks to its magic number of protons

33. Primary school
Branko Radicevic
Nevena Stevanovic The Chemical tree

34. Primary school
Branko Radicevic
 Barium is a soft silvery metallic alkaline earth metal. Because of its
high chemical reactivity, barium is never found in nature as a free
element. The silvery-white color of barium metal rapidly vanishes
upon oxidation in air yielding a dark gray oxide layer. Barium has a
medium specific weight and good electrical conductivity.
 Barium is chemically similar to magnesium, calcium, and strontium,
but even more reactive.