An element's atomic number is 77. how many protons would an atom of this element have? protons

Which statements describe the movement of ocean currents around the globe? check all that apply. strong winds force warm water to sink to the ocean floor. the coriolis effect causes warm and cold water to mix. cool dense water sinks to the ocean floor. warm water replaces cool surface water. wind blowing parallel to the shore causes upwelling of cool water.

Mixing salt in water is an example of physical change

The smallest particle of an element that retains its identity in a chemical reaction. true or false