How many germs does any average household item have?

What happens to the atomic radius when an elctron is lost

What type of electromagnetic radiation has a shorter wavelength than blue light

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