Gravitational is only attracted and electromagnetic is both atrractive and repulsive since it depends what you are talking about
The stability of atoms depends on whether or not their outer-most shell is filled with electrons. If the outer shell is filled, the atom is stable. Atoms with unfilled outer shells are unstable, and will usually form chemical bonds with other atoms to achieve stability.
The kidneys ureters, bladder, and urethra make up the urinary system. They all work together to filter, store and remove liquid waste for your body. Hope this helps have a great day
Answer:
Vertebrates are further classified according to several criteria like exoskeleton, respiratory organs, method of giving birth, number of chambers in heart, mode of living etc. They are further classified into classes Pisces, Amphibia, Reptilia, Aves and Mammals
