By what two characteristics are all the elements of the periodic table placed in

What were the seven different colors from newtons experiment

What does ""electron density in a particular tiny volume of space"" mean?

1. What is an ecosystem! A : All the living things on Earth B:All the nonliving things on Earth C:All the plants and animals that interact with each other on Earth D:All the living and nonliving things in a place or region that interact with each

1. A substance that gets dissolved to create a solution is best described as to as

Explain the process of water displacement and what it measures

c. When we heat water up by the Bunsen burner, what temperature is the boiling water? After 10 minutes

Assuming that air contains 78 percent N2, 21 percent O2 and 1 percent Ar, all by volume. How many molecules of each type of gas are present in 1.0 L of air at STP?

Two children are playing tag. Child A who is doing the chasing can run 100m in 24 seconds Child B is running away from child A and can run 64m in 21 seconds.

What ion does a base increase

What is the definition of Amplitude?