What is co-ordinate covalent bond ? and state the formation of CO​

What is the name of this hydrocarbon?

The continuous release of nuclear energy caused when one fission reaction triggered more nuclear reactions is a

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