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;
1. the state of being absent. 2. failure to be present. 3. the time interval during which something or somebody is away. 4. epilepsy characterized by paroxysmal attacks of brief clouding of consciousness (a possible other abnormalities) Familiarity information: ABSENCE used as a noun is uncommon.