Manganese atom has 30 neutrons and atomic number 25 determine the electron cloud charge of manganese

What is the relationship of air masses and the temperature of oceans?

Which metals are called noble metals

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