What are the most common ions formed by: Sulfur
Potassium
Oxygen
Hydrogen
And what are their symbol, atomic number, atomic mass, protons, neutrons, electrons, and charge?

Compare and contrast physical changes with chemical changes.

Apiece of copper has a temperature of 75.6 0c. when the metal is placed in 100.0 grams of water at 19.1 0c, the temperature rises by 5.5 0c. what is the mass of the metal?

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?