According to keplers third law what is the ratio of the squares of the periods of any two planets equal to?

3. The density of pure solid copper is 8.94 grams per milliliter. What volume does 5 kilograms of copper occupy?

Three different particles have the same electron configuration one is a cation of an alkali metal one is an anion of the halide in the third period and the third particle is an atom of a noble gas what are the identity of the three particles which

Explain why the invention of the microscope was important in the study of cells

How is matter described?

Which is the electronic configuration for oxygen? 1 1s 2s22p! 182282 203 o 182 252 2p4 1s 2s 2p

A magnesium atom has 2 valence electrons in its third shell. Which is a TRUE statement about what happens when it forms an ion? A. It will be an anion. B. It will have more electrons than protons. C.

What scientific discoveries led to changes in Dalton's atomic theory?

What does berkelium react with

Classifying living things

Find the parent acid and parent base of al2 (co33, determine if they are strong or weak, and determine if the salt is acidic, basic, neutral, or unpredictable.