Chose all the right answers Which of the following are chemical changes?

smashing a rock
breaking glass
digesting your lunch
iron rusting
burning paper

Using the periodic table, complete the table to describe each atom. type in your answers

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

Identify arrows pointing to bonding electrons. done h-0-0-h ) intro