How many electrons are in an element if the atomic number is 11?

What happens when light is scattered?

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?