How many electrons did magnesium give to each chlorine atom

How are isotopes of the same chemical element alike? how are they different?

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?

Answer explain why it is not possible to deduce a complete order of reactivity.