martes, 23 de abril de 2013

Element cards: Californium by Lydia Sánchez

Element cards: Phosphorus by Lydia Sánchez

Element cards: Hassium by Lydia Sánchez

Element cards: Krypton by Lydia Sánchez

Ley de Desintegración Radiactiva.

N = N0 e-λt

Simulación en Java sobre la ley de Desintegración radiactiva elaborada por Ángel Franco García

lunes, 8 de abril de 2013

Periodic table cards.

In this activity I want you to make a collection of cards about every element in the periodic table. They are 118 elements and you are twenty four, that means that each of you have to make cards about 4 or 5 elements. When we have all the cards we will have the opportunity to build a giant periodic table if we find a good place in the high school for it.

In the link below you have a list with your names and the elements you have to work about.

In order to give all of the cards the same appearance you have four examples in the link below. All of them have information:
  • Atomic number (Z): as you could know elements are ordered according to their atomic number.
  • Symbol. They are written in a special kind of characters called “Font-work” (some similar to “Word-art” in MS Office)
  • Name in both languages, Spanish and English.
  • Atomic mass, in other words, the average mass of the atoms of the element.
  • Electron arrangement: the number of electron in each shell and sub-shell in an atom of the element.
  • Physical properties: elements have lots of properties, but I have only chosen three of them: melting point, boiling point and density.
  • Discovery: Who discovered the element? When was it discovered?
  • Photograph: Be carefull with this, not any picture is valid. Get sure that you are using a photo of the element. A photo of a compound or a mixture that contains the element is not valid. The best option is a photo of an usual object made entirely of the element but this in not always easy. Some elements, mainly the ones with highest atomic number are impossible to get a photo of them because they are not stable.
  • A little piece of information about the element. Four of five lines explaining why the element is important, useful or interesting, a property of its that called your attention,...
A few tips to make easier your work (and also, not to spend too much time at class explaining all this)
  1. All of you must work with the same software oppenoffice, you can download it here:
  2. I suggest you download any sample file made by me, make a copy of it in your computer and make the necessary changes in it.
  3. Don't change the fonts, this is the only way to get an homogeneous aspect in all cards.
  4. Periodic tables usually show different properties of elements with colours. We will change the colour for the symbol (according to kind of elements) and the colour of border (according to the physical state). See the file lista.odt.

The cards must be in my email ( by 30th of April of 2013. You can email me them before if you want, but there are no reason to do it later, you have plenty of time.


A sample of what I want you to make

List of the elements that every one of you has to work

Download oppenoffice

Periodic table

jueves, 4 de abril de 2013

Algunas experiencias sencillas sobre convección.

Conducción, radiación y convección

Alkali metals and water

This video is from the Britsh TV show Brainiac. It shows us how all alkali metals react with water giving out energy.

As we can se, the heavier is the alkali metal, the more explosive is the reaction we get. 

Meet the elements.

How many elements are mentioned in this song?
Which of them are used as a simple element?
Which of them are mentioned as a component of a compound?