Question

The grid below shows a part of the periodic table. The letters do not represent the actual symbols. Study it and answer the questions that follow.

1. Identify the elements in period 1
2. With a reason, identify the element with the largest atomic radius 
3. Draw the atomic structure of element Q
4. Write down the electronic configurations of elements Y and W 
   • Y- ……………………………………………………………………….
   • W- ………………………………………………………………………
5. Element G forms an ion G3- and its ionic configuration 2.8.8. indicate its position on the grid above 
6. Identify an element whose oxide reacts with both acids and alkalis 
7.    
   1. Write down the chemical formular of the compound formed between elements K and
   2. Draw the bonding in the compound formed in (g) (i) above using dots (.) and crosses (x) to represent electrons 
8. Compare the atomic radius elements X and K. Explain 

Answer 1

1. C and T (Mark tied to the two elements)
2. J – has five energy levels/ highest number of energy levels.
3. 
   
4.    
   • Y -2,8,8,2 
   • W- 2,8,7
5.    
   • Period 3 
   • Group 5 
6. M
7.    
   • KW2
   • 
     
8.    
   • K has a smaller  atomic radius than X
   • K   has more  protons in the nucleus which increase the nucleus force of attraction (higher nuclear charge) hence the electrons on the energy levels are strongly attracted towards the nucleus.