Which of the following groups of elements are likely to be radioactive? (5 points) a Actinides b Noble gases c Transition metals d BCNOs

An object becomes electrically charged when: electrons are created in it electrons from it are destroyed electrons are transferred to it protons from it are destroyed protons are created in it

What is the molecular weight of copper

Which substance—wood or silver—is the better thermal conductor? a thermal conductor is a material that requires very little heat energy to change its temperature. explain your answer.