Which of the following elements is a metalloid?

vanadium (v)

radon (rn)

silicon (si)

rubidium (rb)

In an investigation that uses the scientific method, which step immediately follows making a hypothesis? o summarizing the results o asking a question o making observations designing an experiment mark this and retum save and exit next submit

The identities of substances are the same before and after which type of change

How many moles of oxygen react with 12 moles of aluminum