Periodic table is a list of simple chemical substances (element) arranged according to their atomic number.
It been a while since we have been in o school,let's refresh a little bit.
The first element is Hydrogen, a chemical element with symbol H atomic number 1 and atomic weight 1.00794. it is the lightest element on the periodic table, it's monoatomic most abundant substance in the universe with 75% of all baryonic mass.
Here are some characters of hydrogen that will help keep ur mind fresh about it.
1. Latin name is; Hydrogenium.
2. Year discovered; 1766.
3. Discovered by; Henry Cavendish.
4. Electron shell; K1.
5. Electron;1 proton;1 neutron;0.
6. Atomic weight; 1.00784(g/mol).
7. Density; 0.0000899(g/cm³).
8. Phase; Gas.
9. Valence electrons;1.
10. Period; 1.
11. Group; 1A.
12. Block; s-block.
13. Electronic configuration; 1s¹.
14. Oxidation states; -1 +1.
15. Ion exchange; H+ H-.
16. Electronegativity; 2.2.
17. Electron affinity; 72.8kj/mol.
18. Magnetism; Dimaganetism.
19. Crystal structure; Hexagonal.
20. It has a grid parameters; a=3.780Å c=6.167Å.
21. Hydrogen has the temperature; -163.15°c=-261.67°F=110.0K.
22. Constituent of hydrogen in universe; 75%.
23. Constituent in sun; 75%.
24. Constituent in ocean; 11%.
25. Constituent in human; 10%.
26. Constituent in Earth crust; 0.15%.
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