Can the properties of an element be predicted using a periodic table? WHY?

What is avogadro’s number, and why is it useful

Compare and contrast physical changes with chemical changes.

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.