Best Answer: First true and second false.- ... Isotopes of an element have different atomic masses is TRUE. An isotope is an element, say carbon for example, that ...
Absent-mindedness is where a person shows inattentive or forgetful behaviour. It can have three different causes: a low level of attention (blanking or zoning out) intense attention to a single object of focus (hyperfocus) that makes a person oblivious to events around him or her;
However, the mad scientist archetype usually has malevolent connotations, while the absent-minded professor is typically characterized as benevolent. The fictional absent-minded professor is often a college professor of science or engineering; in the fantasy genre, a similar character may appear as a wizard.