When an atom gains an electron it becomes a positive ion. true or false?

All of the following are part of the biosphere except

What is the independent variable in this investigation? mass volume sample number substance density

Acm ruler with main graduations from 1 to 10 from left to right there are 10 secondary graduations between each of the main graduations there is a line that begins. at the left end of the ruler 10 secondary graduations to the left of the “1 main graduation the right end of the line ends on the eighth secondary graduation to the right of 3 how long is the line