Atoms of different elements have a different mass and volume. why is the statement true? atoms of all elements have a spherical shape. atoms have protons, neutrons, and electrons. atoms lack the same number of electrons. atoms have unique properties that define them.

1) how many electrons are in each energy level of the following elements? a. he b. na c. na d. ne 2) how many valence electrons are percent in the following atoms? a. s b. mg c. be d. cl 3) which of the following elements are stable as atoms? a. he b. o c. cl d. ar if you are able to provide the work as to how you got the answers that would be greatly appreciated. : )

Ibeg i need 20. a reaction produces 4.93 l of oxygen, but was supposed to produce 1 mol of oxygen. what is the percent yield?

In salt water solution,the salt is the blank