What kind of workers are shown in the photograph? A. Hunters and gatherers
B. Factory workers
C. Administrators
D. Farm hands

Easy definition for atom and atomic mass

Evaluate this exponential expression,8. (2 + 3)2 – 42

If e is the symbol for an element, which two of the following symbols represent isotopes of the same element? 1. e2. e3. ea.1 and 2c.1 and 4b.3 and 4d.2 and 3