97% of the human body is made out of carbon, hydrogen, nitrogen, oxygen,
phosphorus and sulfur (chnops).

a. true

or

b. false

surface modification is a versatile tool and has been widely used in material science and engineering that has significantly facilitated the study and characterization of complex materials. at  matexcel, experienced experts in surface science can offer tailored efforts to meet the specific needs from our clients.

layer 3 is younger than layer 6.