<u>Answer:</u> Some of the mass gets converted in the form of energy related to mass.
<u>Explanation:</u>
Mass defect is defined as the difference in the mass of an isotope and the mass number of an atom. Equation representing mass defect is:
![\Delta m=[(n_p\times m_p)+(n_n\times m_n)]-M](https://tex.z-dn.net/?f=%5CDelta%20m%3D%5B%28n_p%5Ctimes%20m_p%29%2B%28n_n%5Ctimes%20m_n%29%5D-M)
where,
= mass defect of an atom
= number of protons
= mass of one proton
= number of neutrons
= mass of one neutron
M = mass number
The mass number of an atom (mass of nucleus) is always less than the isotopic mass (total mass of its nucleons) because energy is released when nucleus gets formed. This energy is related to mass of the nucleus and is known as binding energy.
Hence, some of the mass gets converted in the form of energy related to mass.
Answer:
Lithium has a melting point of 180.54 C, a boiling point of 1342 C, a specific gravity of 0.534 (20 C), and a valence of 1. It is the lightest of the metals, with a density approximately half that of water. Under ordinary conditions, lithium is the least dense of the solid elements.
Appearance: soft, silvery-white metal
Atomic Number: 3
Atomic Radius (pm): 155
There no equation to balance.
Anyway
To be a balance equation the atom on the both side need to equal.
The 2,4 and 5 positions are accessible for nitration of 1,3‑dimethylbenzene. The final product is shown in the image attached.
<h3>What is nitration?</h3>
Nitration is a type of reaction in which the nitro group (-NO2) is introduced to an aromatic ring. We have to note that in the compound 1,3‑dimethylbenzene, the 2,4 and 5 positions are accessible for nitration as shown.
Hence, the nitration of 1,3‑dimethylbenzene occurs as shown in the image attached with the compound shown being the major product.
Learn more about nitration: brainly.com/question/5346392
