Answer:
A liquid is a nearly incompressible fluid that conforms to the shape of its container but retains a (nearly) constant volume independent of pressure. As such, it is one of the four fundamental states of matter (the others being solid, gas, and plasma), and is the only state with a definite volume but no fixed shape.
6 protons, 7 neutrons, and if it has no charge then it has 6 electrons
The fixed reference points on the Celsius thermometer is 0 and 100.