Hey Grade 7!
Here is a link to a cool explanation on Elements and Compounds. It is an interactive simulation but it doesn’t work on Chrome. Open the link in Firefox or Safari and it will work fine!
If you take a look at the Resources page for your class, you’ll see the link there too!
There are a lot of terms that have one meaning in general use and another meaning in science. This article by Tia Ghose and LiveScience, points out seven such words.
hypothesis law skeptic
theory natural model
are all mentioned.
Do you know how to use these words properly in science? What about these words…
weight heat temperature
If you take a closer look at the Periodic Table, you’ll notice down the bottom is two rows of elements that we don’t really discuss in science at school. These are called the Lanthanide and Actinide series. Some of these are naturally occurring like uranium which is used in nuclear power stations. Others are so heavy, that they only exist momentarily in a laboratory.
A laboratory at a university in Sweden is claiming to have discovered an element with an atomic number of 115. This means that the atom would have 115 protons. It hasn’t been named yet. Any “new” element needs to be confirmed by the International Union of Applied and Pure Physics and Chemistry.
Elements have been named in various ways:
- After people connected to the element eg Einsteinium Es
- After countries eg Francium Fr
- After continents eg Americium Am
- After gods or characters in mythology eg Mercury Hg
- From Greek routes eg Hydrogen H (from hydro [Greek for water] and genes [Greek for creator])
Sometimes the symbol does not relate to the English word for the element. For example, sodium has the symbol Na which comes from the Latin word for sodium which is natrium.
What would be your suggestions for a name and symbol for this new element and what would be your justification for the name?
Feel free to leave your suggestions as comments!
For tomorrow’s lesson, please make sure that you have completed the following questions in your notebook from our Rainbow Lab today.
- Were the combined volumes always what you expected and if not, why?
- What could you do to work more effectively in a team?
- Name 3 lab techniques or things that you learnt or were reminded of today.
I will check everyone’s notebook tomorrow so please have this completed.
Know what you need to know
The IB Chemistry syllabus has everything you need to know for your IB Chemistry exam. You could download a copy of this document so that you can use it off-line too.
The program outline you have, refers to the syllabus. Use it!
Tips for using the syllabus
- Before each lesson, check on the program what syllabus points we are going to cover that day. Have a read of that section of the topic in your study guide. Even if you don’t understand the new material, if you have read about it previously, you will have a better chance of understanding it during the lesson.
- After each lesson, check the detailed syllabus points you had in class that day and highlight or circle any that you don’t understand. It is a fast moving course so it is important that you get help immediately with anything that you don’t understand. The best place to start is with your peers in your class. You can also try a Youtube video (there are many for almost any point in the syllabus) or you can even ask me!
Your syllabus is a powerful tool for studying effectively – USE IT!
Here is a little teaser in case you were wondering what the difference is between my class and Miss Madrid’s…
Have a great year and I look forward to seeing you all in M313!