Which ion gained 2 electrons and now has 34?

Easy definition for atom and atomic mass

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles

3. how much energy in joules is required to evaporate .0005 kg of liquid ammonia to vapor at the same temperature? 4. how much energy ( in megajoules ) is given up by .75 kg of water at 0c when it freezes to form ice at 0c? 5. explain how heat works between and at critical temperatures?