An element's atomic number is 49. how many electrons would an atom of this element have?

Wich organism obtains its energy from dead or decaying matter

Patient has just received an organ transplant which treatment would be most effective in preventing the patient’s body from

What are the two causes of density in deep current waters? a. salinity (how much salt) of the water and high temperaturesb. salinity (how much salt) of the water and low temperatures c. oxygen content of the water and high temperatures. d. oxygen content of the water and low temperatures