Which of the following is an example of a vertical merger?

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.

In which situation can a mixture always be called a solution

With the largest atoms and the smallest number of valence electrons and with the smallest atoms and the greatest number of valence electrons are the most reactive. a. nonmetals; metals b. nonmetals; transition elements c. transition elements; metals d. metals; nonmetals