Hydrogen protons collide with one another to create: A). Helium and energy.
B). Boron and energy.
C). Carbon monoxide and energy. D). None of the above.

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.

The msds for glacial acetic acid says that it is a flammable liquid that can severely burn any human tissue it comes in contact with. it reacts with bases, various metals, and strong oxidizing agents. its vapors can form explosive mixtures with air.

In general metals get as you move from left to right across the periodic table.