What element has a 2+ charge when it has 54 electrons ?

Suppose you have designed a new thermometer called the x thermometer. on the x scale the boiling point of water is 129 ? x and the freezing point of water is 13 ? x. part a at what temperature are the readings on the fahrenheit and x thermometers the same?

What energy is it when you flip on a switch on a lamp

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false