Question

the image below shows an isotope of lithium. write the isotope notation (chemical symbol). a. $^{7}_{3}li$ b. $^{6}_{3}li$ c. $^{3}_{7}li$ d. $^{3}_{6}li$

Explanation:

Step1: Identify atomic number

Lithium has an atomic number of 3, which is the number of protons and is written as the sub - script in isotope notation.

Step2: Count nucleons

Count the number of protons and neutrons in the nucleus. There are 3 protons and 4 neutrons, so the mass number (sum of protons and neutrons) is 7. The mass number is written as the super - script in isotope notation.

Answer:

A. $^{7}_{3}\text{Li}$