How have scientists discovered the structure of atoms? a. By looking at them under a microscope
b. By running experiments that expose their properties
c. By examining only the largest atoms.
d. Bysplitting them apart.

Explanation:Well most scientists used microscopes but they also looked at bigger ones so the answer would be “by running experiments that expose there properties”

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.