What do you think the total charge will be for a stable ionic compound (made up of positive and negative ions)? Why? What implications does this have for the height of
the cards in an ionic compound formed in this activity?

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.