Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Robyn Williams: And our second book is a new one. Tom Jackson has just produced a lovely one on the ...

I don't do book reviews very often. In fact, I don’t think I’ve done one since fifth grade, but as part of my regular email flow I get come-ons from O’Reilly Media, which distributes No Starch Press ...

Cations are ions that are positively charged. Anions are ions that are negatively charged. Ions are charged atoms or molecules. If a balanced atom loses one or more electrons, it will become a ...

It’s that time of the year again, when all the fun and joy disappear for a while. This is because you hear your parents and teachers asking you to be serious with your studies as the exams are about ...

The high relative abundance of these tellurium isotopes gives tellurium the greater relative atomic mass. The atomic number of tellurium is 52 and the atomic number of iodine is 53, so these elements ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...

Six-mark questions are extended open response questions. These require longer answers than the structured questions that have fewer marks. It is wise to plan your answer first by making some notes.

Discover the history, structure, and importance of the periodic table of elements, from Mendeleev’s discovery to modern scientific applications. When you purchase through links on our site, we may ...