As scientists have learned more about atoms, models of atoms have changed. One of the first atomic models was a solid ball, such as a marble. What are two limitations of using a marble to model an atom?

A. the model does not move or behave like a real atom.

B. the model is not made of commonly available materials or objects.

C. the model does not show the true size of an atom.

D. the model is much harder to see than a real atom.

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?

About 70 percent of the earth's surface is water-covered, and about 96.5 percent of all earth's water is salt water. identify the watery feature on earth that is made of freshwater rather than salt water. a) bay b) glacier c) ocean d) sea it is not incomplete this is the true question

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.