However, some elements are capable of forming both cations and anions given the right conditions. One example is hydrogen, which may gain (H -) or lose (H +) an electron, forming hydride compounds ...

Students learn to describe the pattern in atomic number, atomic mass and atomic radius. Trends on the Periodic Table: Students learn to describe the pattern in atomic number, atomic mass, atomic ...

Free interactive and download to print GCSE Chemistry flashcards to help prepare for your GCSE exams. Revise topics such as the three states of matter, changes of state, ionic compounds, small ...

Imagine the periodic table as a playground of bullies, snobs and wallflowers, and you might memorize the elements overnight. Chemistry, after all, is about making and breaking bonds. It's about ...