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;
a person who is absent, especially from work or school. 2. a person who absents himself or herself, as a landowner who does not live on certain property owned or a voter who is permitted to cast a ballot by mail. Origin of absentee. 1530-1540.