Which does not describe the relationship between the nucleus and the electron cloud of an atom

Could someone me with number one you

Some tools have graduations to show multiple measurements. for example, a ruler may have graduations for both millimeters and centimeters. when measuring the length of an earthworm, which graduations would allow for the most accurate measurement? millimeters centimeters decimeters meters

Mutations can be categorized based on the kind of effect they have on an organism