Students were shown models of two atoms and asked to make a list of similarities and differences between the models. Which statement about the atomic models shown is correct?

What is the formula that this ionic compounds could form sr2+p3-o2-

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?