Alogical, systematic approach to the solution of a scientific problem
1. scientific method
2. scientific law
3. chemistry
4. experiment

the answer is c i believe

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.