Compare the modern (electron cloud) model of the atom with Dalton’s atomic model. Which of these statements describe the two models correctly? Check all of the boxes that apply. (please ASAP) A. Dalton’s model was replaced only because of its age. B. Dalton’s model represented atoms as indivisible, but the modern theory recognizes that they contain smaller particles. C. The modern model explains all available data about atoms; Dalton’s model does not. D. The modern model is more widely accepted because it was proposed by more well known scientists.

Write the empirical chemical formula of calcium with a mass percent of 38.8, phosphorus with a mass percent of 20.0, and oxygen with a mass percent of 41.3.

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.

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size