Identify and describe 2 changes of state that release energy

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

Which factor is likely to impact the possible number of compounds ?

Polar bears give birth and hunt on sea ice. which of the following would polar bears survive during the melting of arctic ice? growing another layer of fur during summer migrate inland to search for different food sources staying put until the ice refreezes sticking to the usual diet of seals