1 - Long story of mater

1.1 - level of organisation : chemical elements

molecules

video 4'57 : https://youtu.be/_lNF3_30lUE How Small Is An Atom? Spoiler: Very Small. Atoms are very weird. Wrapping your head around exactly how weird, is close to impossible – how can you describe something that is SO removed from humans experience? But then again, they kind of make up everything, so let us try anyways.

write : names for the symbols of the chemical elements and compounds in a table

 build and draw your molecules : https://molview.org/?cid=21262180 to try to understand chemestry

!Chemistry (p. 36)
1. Na, sodium, (e) the basic substance in salt
2. Ca, calcium, (p) metallic element which is the
major component of bones and teeth
3. Pb, lead, (l) heavy soft metallic element which is
poisonous in compounds
4. Ti, titanium, (n) light metallic element which
does not corrode
5. Ba, barium, (d) used as a contrast when taking
X-ray photographs of soft tissue
6. Zn, zinc, (s) white metallic trace element
7. Fe, iron, (j) an essential part of the red pigment
in blood cells, found in liver and eggs
8. Co, cobalt, (f) metallic element which is the basis
of a radioactive isotope used to treat cancer
9. Cl, chlorine, (q) powerful greenish gas, used to
sterilise water
10. He, helium, (m) very light gas used in
combination with oxygen, especially to relieve
asthma or sickness caused by decompression
11. S, sulphur, (t) yellow non-metallic element found
in some amino acids
12. Au, gold, (r) soft yellow-coloured precious
metal, used as a compound in various drugs, and
sometimes as a filling for teeth
13. O, oxygen, (h) colourless gas which is present in
air and essential to human life
14. H, hydrogen, (k) gas which combines with
oxygen to form water
15. HCI, hydrochloric acid, (a) acid found in the
gastric juices which helps to break apart the
food
16. N, nitrogen, (o) gas which is the main
component of air and an essential
part of protein
17. HCN, hydrocyanic acid, (b) acid which forms
cyanide
18. C, carbon, (i) one of the common non-metallic
elements which is an essential component of
living matter and organic chemical compounds
19. N2O, nitrous oxide, (g) colourless gas with a
sweet smell, used in combination with other
gases as an anaesthetic in dentistry and surgery
20. C10H14N2, nicotine, (c) main alkaloid substance
found in tobacco