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;
The first three are sins of omission that involve forgetting, and the second four are sins of commission that involve distorted or unwanted recollections. 1  Transience--the decreasing accessibility of memory over time. 2  Absent-mindedness--lapses of attention and forgetting to do things.