1.1. A student is designing revision material on atomic structure. 

They design the table shown in Figure 1 below, with the properties of the particles that make up an atom:  

Figure 1 

Some of the information in Figure 1 is missing.

Complete the missing information.

1.2. The student wonders how to come up with an explanation for the term ‘neutral atom’.

By referring to the number of electrons and protons, explain what is meant by the term ‘neutral atom’. 

1.3. To show an example of isotope notation, the student inserts an image of the element nitrogen into their revision notes, as shown in Figure 2 below.

Figure 2

Use Figure 2 to determine the number of neutrons in nitrogen.

1.4. The student wishes to design a section on isotopes in the revision material.

They draw another image, as shown in Figure 3:

Figure 3

Use Figure 3 to show a possible isotope of nitrogen, filling in the missing spaces.