What are metalloids? something on the right side of the periodic table something on the left side of the periodic table something in the last column on the periodic table something along the stair step on the perioidic table

What is a scientific theory? a. a scientist's guess about how something works b. the results of an experiment obtained using the scientific method c. a proven fact that will never change d. an idea that is backed by data from many sources

Which substance has non polar covalent bonds

An alpha particle is: a hydrogen atom a nucleus of helium two neutrons an electron