Which subatomic particle is electrically neutral and found in the nucleus of an atom?

What are transitions between a liquid and gas called? identify which way they are transitioning

What is the approximate mass of 25 cm3 of silver, if the density is 10.5 g/cm3? a. 0.42 g b. 2.4 g c. 42 g d. 260 g

If a sample of radioactive isotopes takes 600 minutes to decay from 400 grams to 50 grams, what is the half-life of the isotope?