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The atom

the inside story


on 10 January 2013

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Transcript of The atom

by Alex Abadia The Atomic Structure Dalton was a chemist who tried to investigate why most reactions occurred the way they did.
One of his theories was that all things are made of atoms no matter if split, divided, or demolished.
Atoms with the same elements are exactly the same and ones that aren't are a completely different.
Atoms can join together to create a new material.
Rutherford's Theory The name of his experiment was called Rutherford's Gold Foil Experiment
in the end of his results he saw that the plumb-pudding model didn't support his conclusion.
He then proceeded to create an entirely new Atomic structure. Thomson's Theory Four Theories of An Atomic Structure Thomson's Theory Rutherford's Theory Bohr's Theroy Through an experiment that he created he found that there was something inside the atom itself.
There was a current of small electric particles that had were negatively charged.
He then names them "electrons". Dalton's theroy Dalton's Theory Niels Bohr Had an idea that electrons might travel in defined paths at a certain distance from the nucleus
He also included that atoms were able to jump to another path but, not in the middle of the paths. Rutheford's Gold Foil Experiment In this test he placed an element like radium in lead leaving it with only one exit.
The particles that escaped and were shot out toward a piece of gold foil where it would pass through it and hit the zinc sulfide that surrounded it.
Instead of passing straight through the gold foil like he thought it instead splattered in all directions.
Then he realized the plumb-pudding model didn't fit the description of what he tested then leading us to a completely new model of the atomic structure. Dalton's Atomic structure THAT DETAIL it looks delicious Rutherford's atomic structure CAN NOT CONTAIN
ALL THIS DETAIL The most current model of the atomic structure CHARM QUARKS The Charm quark is the third most massive out of them all.
has a charge of +2/3
It has a mass of 2,900 times greater than an electron.
Periodic Table of Elements Moseley Mendeleev Moseley's Table Mendeleev's Table He was a Russian chemist who after studying the elements very closely knew that there was a order and tried to solve it.
Although he was right about the order he had problems.
He tried to order by there weight when you actually use the number of protons. He was an English physicist.
He had showed that they had to use the atomic number rather than the atomic mass. <this periodic table is organized by the atomic mass of the element.
This caused him a variety of problems <In this table Moseley doesn't use the atomic mass.
Instead he uses the atomic number which then everything falls into place. Chemical Bonds ionic bonds
covalent bonds
metallic bonds Ionic Bonds Ionic bond: The bond formed between two ions in transferring one or more electrons.
Covalent Bonds Covalent bonds: A bond formed by sharing electrons by two atoms. Metallic Bonds Metallic bonds: Occurs when a valence electron moves throughout the metal lattice. Similarities & Differences Similarities: They all need valance electrons.
They need two or more atoms to form. Differences: Ionic bonds you take or give. Covalent bonds you have to share. Metallic bonds the electrons move freely. Criss-Cross Method Li+1 F-1 Li F <you must first find the oxidation numbers of both elements < here is were you switch the numbers and there signs.
Although in here they cancel each other out. < You then place the elements together and create... LITHIUM-FLUORIDE in this final step you place the names of the elements together.
Although for the second word you change it's ending to -ide. Law of Conservation of mass A basic rule that states that matter cannot be destroyed nor created from an isolated system. Synthesis Reaction: Two or more substances combine to form another substance.
Decomposition Reaction: One substance breaks down into two or more substances.
Single-Displacement Reaction: One element replaces another in a compound.
Double-Displacement Reaction: A precipitate, water, or a gas forms when two ionic compounds in solution are combined.
Combustion Reaction: When oxygen combines with another compound to form carbon dioxide.
Acid-Base: A special kind of double-displacement reaction that takes place when an acid and a base react to each other. Combustion Reaction C+O2 -> CO2 Decomposition Reaction (NH4)2CrO7 -> N2+4H2O+Cr2O3 Demonstrate H2+O2->H2O
H=2 | H=2
O=2 | O=1 First we set up a line to seperate the numbers. H2+O2->2H2O
H=2 | H=2 =>4
O=2 | O=1=>2 Now we had to replace the "O" 1 with a 2. but we also put one in the beginning thus turning the right sides H from 2 to 4. 2H2+O2->2H2O
H=2=>4 | H=4
O=2 | O=2 Then turning the left H's 2 to a 4 but, like i said you have to do the same to the top. finish project
2H2+O=2H2O Synthesis Reaction 2Mg+O2->2MgO Single Displacement Reaction Fe+CuSO4->Cu+FeSO4 Double Displacement Reaction BaCl2+MgSO4->BaSo4+MgCl2 Acid-Base Reaction H2O+NH3->NH4+OH
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