Which of these is an example of a physical change?

What does the cell nucleus do or, how does it function?

What are transitions between a liquid and a solid called? identify which way they are transitioning

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.