In the other side of the rainbow.

How is made up a rainbow? 

Objects look made of different colors because we perceive the light reflected as colored light. The first studied and explained satisfactorily the colors of light, was Newton.

He experiments with a glass prism and established something that at first glance appears to contradict the experience: the white light as the Sun, is composed of several types of lights, lights that we perceive as colors.

This experiment was known as the “Newton diagram for the spectrum of white light” and demonstrated that the predominant colors were: red, orange, yellow, green, blue and violet, which were continuous and appeared in the same order.

However, Newton also showed that the white light can be re-obtained if these colored lights are matched again, what is achieved with a lens.

And that is why when it rains; we can see how sunlight breaks down in the familiar six colors of the rainbow through the rain drops and moisture, which work like prisms.

Now, don’t waste your time and experiment with different types of glass prisms to see what you can get ;)

See you the next post :D!

What's the matter with ATOMS?!

ATOMIC MODELS

Since antiquity, humans have questioned how is matter made up.  Some 400 years before Christ, the Greek philosopher Democritus regarded the matter was made up of tiny particles that could not be divided into smaller ones. Therefore, these particles called atoms,  which in Greek means "indivisible." Atoms Democritus attributed to the qualities of being eternal, immutable and indivisible. 

However, the ideas of Democritus on the subject were not accepted by the philosophers of his time and had to spend about 2200 years for the idea of atoms was taken back into consideration. But let's go centuries later to see the most important atomic models that explore how matter is made up.

Begining with John Dalton, during the eighteenth century and early nineteenth centuries scientists were investigating various aspects of chemical reactions, obtaining the so-called classical laws of chemistry. After that in 1808 dalton made his own atomic model. The image of the atom described by Dalton in his atomic model to explain these laws is that of tiny spherical particles, indivisible and unchangeable, equal to each other on each chemical element.

Years later, in 1897 JJ Thomson, and based on early models made certain experiments and said: HEY! , within the atoms are tiny particles with negative electric charge, which are called ELECTRONS, and that's why he thought that atom had to be a sphere of positively charged matter, within which the electrons were embedded.

But in 1911 E. Rutherford represented the atom as a miniature solar system in which the electrons moving like planets around the world. Also, a couple years later, Niels Bohr came with a new statement which quantized orbits to explain the stability of the atom.

 

Ultimately not to make a long story... in 1926 Erwin Schrödinger stablished the final atomic model, now known as the actual atomic model. He left the idea of precise orbits and replaced it by descriptions of the regions of space (called orbitals), where it is most likely that the electrons are.

So, that's everything for now, see you in the next post ;)!

 

Dimethicone.. in my shampoo D:?!

Molecular Formula: (C 2 H 6 OSi) n
Density:  965 kg m -3

Yes mates, as you could see, now is time to talk about DIMETHICONE. But what is that?, why do I say that is in my shampoo? Well, our new mate dimethicone has a crush with silicone, that's why they're together in a certain way. Actually, dimethicone is an inert silicone surfactant properties.

But how does it work?, Where can I find it?, Dimethicones is commercially presented in tablets, drops, emulsion, and it works by reducing the surface tension of gas bubbles facilitating disintegration. That's why it's present in medicines recomended to reduce colics in babies, aerofagia, bloating, cramping or abdominal pain after surgery

But wait, it's not only present in medicines as "Espaven" or others. We can find it in many other products like palmolive's shampoos and as the one that I use called "Caprice maxi-gloss". However, dimethicone is also present in make-up, eye shadows, facial products as moisturizer and other brand's shampoos.

Don't you want to prove it? It's easy, just take a look in the ingredient's label in one of the products I mentioned above and you will see my friend (:

Good luck and as always, let's heat our chemistry ;)

"COSMOS Online® DIMETICONA." COSMOS Online®. 2009. Web. 13 Aug. 2010. <http://www.cosmos.com.mx/g/tec/dpd4.htm?search=dimeticona>.

Welcome to Heathen Chemistry

Chemistry is all, including you

Hi mates! , this blog is called "Heathen Chemistry" and do you know why? Well, if you're really oasis' fans as I am, you would know that is the name of one of their first albums. Actually, my profile picture is Noel Gallagher, lead guitarrist of this glorius band.

But OK, let's go back to the main purpose of this blog, "Heathen Chemistry" is principally my entire life related to Chemistry ,and you know, compounds, elements, Mendeleiev, and stuff.

For now, I'll upload information that I'm sure will be interesting, not only because are things that I will discover in my course of Chemistry, but 'cause I'll try to relate them to your lifes.

So, enjoy it and let's heat your chemistry!!