In a calcium atom in the ground state, the electrons that possess the least amount of energy are located in the(1) first electron shell(2) second electron shell(3) third electron shell(4) fourth electron shell

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