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;
Jeanette can best be described as the absent-minded professor of the group. Gifted with extraordinary intelligence, she often is so caught up in contemplating the universe that she forgets the simple matters of life, such as not tripping over her own feet.