The volume of an irregular solid can be found from its displacement in a known volume of water. Find the volume of an irregular solid if 10.00 mL water in a 25-mL graduated cylinder rises to 17.3 mL when the solid sinks to the bottom of the cylinder and all air bubbles rise to the surface. (Remember to put a space between your numerical value and the unit.)

The volume of an irregularly shaped solid can be determined from the volume of water it displaces. A graduated cylinder contains 19.9 mL of water. When a small piece of galena is added, it sinks and the volume increases to 24.5 mL

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

so what is the problem with your lab report and whats the subject of the lab report? i will you