Rh- Carbon exists in several different forms called allotropes. Ir- Carbon exists in several different forms called aromatics. Ni-In any column, the higher an element, the less reactive it is. In any column, all elements react the same. Electrons are positively charged.
Electrons are neutral.
Electrons are negatively charged. Electrons don t move. Cd- Electrons move at the speed of light. Electrons move at the speed of sound. B- Excluding hydrogen, an atom has 8 electrons in its inner shell.