What type of physical change is it when a liquid turns into a solid and a solid turns into a liquid

Which element experiences greater London dispersion forces? fluorine chlorine bromine iodine

A student places a small amount of water in a glass dish and then carefully places a small paperclip on the surface of the water. The paperclip floats. What happens if the student adds a drop or two of dish soap to the water? Explain your answer.

Which atom is the standard that scientists use to compare units of atomic mass?

How many total electrons does the P^3 - ion have? O a. 3 O b. 31 O c. 1 O d. 15 O e. 18

What effect will increased pressure have on 4A (g) + 5B (g) - --> 2C (g) + 7D (g) a - no change b - everything will increase c - C and D will increase d - A and B will increase

Predict what the population of the United States will be in the year 2010

Assume we could alter the conditions in the duodenum. Which of the following would be consistent with inserting a large volume of highly acidic chyme which contained a large amount of fat?

Molecules that form when electrons are shared unequally between atoms are called

Explain why substances do not crumble into piles of atoms.

Being able to identify good source of scientific information and apply the knowledge to problems in your life is a part of having A Scientific hypothesis B Scientific inquiry C Scientific literacy D Scientific laws