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Les affichages 82
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periodic table timeline
A été creé
MARIA FERNANDA GARCIA ROBLEDO
⟶ mise à jour avec succès 29 nov. 2018 ⟶
List of edits
Les lignes de temps de
MARIA FERNANDA GARCIA ROBLEDO
:
9 janv. 2019
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165
periodic timeline Marifer Garcia, Rodrigo Tenorio, Mateo Ortiz, Daniel Soltero.
4 déc. 2018
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56
periodic table diagram
Commentaires
Les événements
Greek Thinkers: They thought the atom was composed of water, fire, air and earth.
Meyer: To arrange 28 elements in 6 families.
cannizaro: he produced more accurate atomic weights for the elements.
Moseley: demonstrated the relationship between the atomic number and the nuclear charge of the elements, called in his honor Moseley's Law. Re-ordered the table by atomic numbers instead of weight, modifying the periodic law.
seaborg: Isolating and identifying transuranium elements in room 307 in Gilman Hall. Isolated radioactive elements. Found the treatment to the thyroid disorder. Removed the heaviest elements from the bottom of the periodic table, and named them the actinide series.
Dobereiner: Arranged elements into groups of three that had similar properties called triads.
Lavoiser: identified more than 30 elements and classified them in metals nonmetals, metalloids
newlands: Arranged the elements in a table by their atomic weights. Noted every 8th element is a repetition of the first.
Mendeleyev: Published the periodic table and periodic law in 1869, forecasting the properties of missing elements. Thought of as the sole originator of the periodic table.
Dechancourtois: First person to list the known elements in order of increasing weight of their atoms and to say that similar electrons occurred at regular atomic weight intervals.
Courtines, Gamov, and Alexander: created a 3D periodic table.
