If 23,000 joules of energy are used to heat water by 4.00 °C, what is the mass of the water?

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).

the answer is d.) potassium