Historical characters
Who or whose was or were the first that mention the concept of "atom"?
Democrito and Leucipo
This character is well known because his work with the atom and molecules, we think modern chemistry started with his work.
John Dalton
Atomo means:
Indivisible
This are substances that cannot be chemically interconverted or broken down into simpler substances and are primary constituents of matter
Elements
This is the law known as conservation of the matter
In a chemical process the matter is not created or destructed, only transformed
The atomic model known as the plumb-pudding model was created by
J. J. Thomson
This person developed the idea that an atom must have a nucleus
Rutherford
Is equal to the number of protons in the nucleus of each atom of an element
Atomic number
Is the total number of neutrons and protons present in the nucleus of an atom of an element.
Molecular mass or atomic mass
How many atoms do you have in one mole of Carbon 12?
6.022 x 1023 the Avogadro number
This scientist is known because of his studies on the orbits around the nucleus in a atom, it was the student of Rutherford
Niels Bohr
His cat was dead on a box... or it was alive?
Schrodinger
This are known as nucleons:
Protons and neutrons
Bohr made a lot of experimentation with this atom, discovering that the energy of the orbits is different in a atom and quantized
Hydrogen
Is the mas of a atom with the units grams per mole
Molar mass !! the units are different from the atomic mass (UMA)
This scientist discover the neutrons !
James Chadwick
With their study about radioactivity they gave the tools to discover the atomic structure
Becquerel and Marie Curie
Atoms that have the same atomic number but different mass numbers are:
Isotope
"Compounds are composed of atoms of more than one element" this is the law of :
Definite proportions
Is the mass of 1 mole of water
18 grams
"In a chemical process the matter is not created or destructed, only transformed" who said this?
Antoine lavoisier
Sadly this scientist has been forget by almost everyone. But he is the one that develop the relationship between wave and particle in atom
De Broglie
Is the amount of a substance that contains as many elementary entities (atoms, molecules, or other particles) as there are atoms in exactly 12 grams (or 0.012 kilogram) of the carbon-12 isotope
The mole !! And is 6.022x1023 particles. Also known as the Avogadro number
"When two elements can combine to form more than one type of compound, the masses of one element that combine with a fixed mass of the other element are in a ratio of small whole numbers" this is the law of:
How many molecules of water do you have in 30 grams of water
1.004x1024 molecules