Where do atoms come from? How does it be come a molecue? After that, what does it become again?

Question

please give me a M-O-R-E detailed answer, I am desperate 4 d answer. TQ

Answer 1

The modern view of an atom has come from many fields of chemistry and physics. The idea of an atom came from ancient Greek science/philosophy and from the results of 18th and 19th century chemistry:

* concept of the atom
* measurements of atomic mass
* repeating or periodic relationship between the elements

Concept of the Atom
From the ancient Greeks through today, we have pondered what ordinary matter is made of. To understand the problem, here is a simple demonstration from a book entitled "The Extraordinary Chemistry of Ordinary Things, 3rd Edition" by Carl H. Snyder:

1. Take a pile of paper clips (all of the same size and color).
2. Divide the pile into two equal piles.
3. Divide each of the smaller piles into two equal piles.
4. Repeat step 3 until you are down to a pile containing only one paper clip. That one paper clip still does the job of a paper clip (i.e., hold loose papers together).
5. Now, take a pair of scissors and cut that one paper clip in half. Can half of the paper clip do the same job as the single paper clip?

If you do the same thing with any element, you will reach an indivisible part that has the same properties of the element, like the single paper clip. This indivisible part is called an atom.

The idea of the atom was first devised by Democritus in 530 B.C. In 1808, an English school teacher and scientist named John Dalton proposed the modern atomic theory. Modern atomic theory simply states the following:

* Every element is made of atoms - piles of paper clips.
* All atoms of any element are the same - all the paper clips in the pile are the same size and color.
* Atoms of different elements are different (size, properties) - like different sizes and colors of paper clips.
* Atoms of different elements can combine to form compounds - you can link different sizes and colors of paper clips together to make new structures.
* In chemical reactions, atoms are not made, destroyed, or changed - no new paper clips appear, no paper clips get lost and no paper clips change from one size/color to another.
* In any compound, the numbers and kinds of atoms remain the same - the total number and types of paper clips that you start with are the same as when you finish.

Dalton's atomic theory formed the groundwork of chemistry at that time. Dalton envisioned atoms as tiny spheres with hooks on them. With these hooks, one atom could combine with another in definite proportions. But some elements could combine to make different compounds (e.g., hydrogen + oxygen could make water or hydrogen peroxide). So, he could not say anything about the numbers of each atom in the molecules of specific substances. Did water have one oxygen with one hydrogen or one oxygen with two hydrogens? This point was resolved when chemists figured out how to weigh atoms.

Answer 2

Atoms are the fundemental building blocks of elements. You cannot break atoms into smaller units and still maintain the physical and chemical properties of the element (It will turn into another element).
According to modern theories atoms were created a very very short time after the big bang (at times much shorter then 1 second!)
An atom is comprised of a nucleus (which contains protons and neutrons) and it is surrounded by its electrons. In an atom the number of protons always equals the number of protons and so the over-all charge of an atom is 0 (it is neutral).
The question of how do atoms bind to form molecules is as old as chemistry itself. There are "old" classical explanations (which work pretty well, but lack some detail) and "new" quantum mechanical explanations.
The simple, classical, explanation says that when two atoms come close together they can share their electrons. This will allow each of them to complete something that is called a "Full outer shell". In general atoms that have 8 electrons in there outer shell are said to have a full outer shell and they are energetically more stable. According to the laws of thermodynamics this means that they will prefare to be in this state rather than a state where each atom has his own electrons and does not complete a full outer shell. The exact reason of why they need exactly 8 electrons can only be explained by qunatum mechanics, but it was observed experimentally over a hundered years ago (actually this how the periodic table of the elements was built - notice the table is divided into 8 groups).
In this sense a molecule is a number of atoms sharing some of their electrons with each other.
A molecule can be broken down back into the atoms which constitute it, but an atom cannot be easily broken down. In fact an atom can only be broken down in a radioactive reaction. In this sort of reaction an element is transformed into another element and a lot of energy is realesed.

Answer 3

There are many answers to your question.
1. Most of the hydrogen in the universe was created by the Big Bang (or God if you believe in creation).
2. Inside a star, as the hydrogen is used for fuel it becomes other elements. This is where most of all these elements have come from.
3. Most of the heavier elements don't last forever. They naturally disintegrate to become lighter atoms. This is where the helium on Earth comes from.

Answer 4

All atoms were created in the Big Bang. Even the atoms in your body were created from space material that exploded out of the Big Bang 16.5 billions years ago. As atoms move about and become part of new structures, it's almost certain that some of the atoms in your body once belonged to William Shakespeare!

A molecule is what happens when two or more atoms combine. For instance, a molecule of water is made up of two hydrogen atoms and one oxygen atom - hence its scientific name of H2O. If a molecule is broken down, it returns to being an assortment of atoms again.

Answer 5

Just to clarify some of the previous answers most atoms were formed well after the big bang.

When the universe came into existence it rapidly cooled, when it was cool enough for protons,neutrons+electrons to bind atoms formed. 75% of these were hydrogen and 25% helium, the proportion of heavier elements was tiny. Stars fuse light elements to produce heavier ones and eventually explode spreading the elements around the universe.

Answer 6

Atoms are the simplest particle. For example Na (sodium) is a type of atom. Molecules are formed when atoms are chemically joined together. For example, H20 (water) hydrogen and water it becomes a molecule. Other molecule includes H2 (hydrogen) as some elements exist in 2 atoms chemically join together.

Answer 7

I'd like to pick up on what water-skipper said. I believe God created the big bang. I also believe God's plan for life included evolution. Atoms become molecules, molecules can form DNA. Evolution includes time in this process. God created time.