Answer: (Chlorine-35)
Element X is Ca
Explanation:
Number of proton plus the number of electron gives the mass number.
<span>Matter is composed of particles that have kinetic energy. Particles with greater kinetic energy tend form liquids or gases due to increased rates of activity of the particles. Particles with lower energy tend to form solids. So, a solid forms when the average energy of a substance's particles decreases.</span>
Initial buret reading means the volume of acid taken in the buret and final reading means the remaining volume of acid after experiment
The mass would be the sum of the protons and neutrons. Your answer would be 218
