For a cation to form, one or more electrons must be lost, typically pulled away by atoms with a stronger affinity for them. The number of electrons lost, and so the charge of the ion, is indicated ...

For a cation to form, one or more electrons must be lost, typically pulled away by atoms with a stronger affinity for them. The number of electrons lost, and so the charge of the ion, is indicated ...

In the past 250 years, new elements have been added to the table about once every 2 ½ years on average, said Paul Karol of Carnegie Mellon University. He chaired the committee that recognized the ...

GCSE Chemistry (Single Science) Atomic structure and the periodic table learning resources for adults, children, parents and teachers.