Lakhmir Singh and Manjit Kaur Solutions for Chapter: Metals And Non-Metals, Exercise 10: Questions Based on High Order Thinking Skills (HOTS)

The electronic configurations of two elements A and B are given below : 

$$\begin{gathered} \mathrm{A} 2,6 \\ \mathrm{B} 2,8,1 \end{gathered}$$
(a) What type of chemical bond is formed between the two atoms of A? 
(b) What type of chemical bond will be formed between the atoms of A and B?

Four elements A, B, C and D have the following electron arrangements in their atoms: 

$$\begin{gathered} \mathrm{A} 2,8,6 \\ \mathrm{B} 2,8,8 \\ \mathrm{C} 2,8,8,1 \\ \mathrm{D} 2,7 \end{gathered}$$
(a) What type of bond is formed when element C combines with element D? 
(b) Which element is an inert gas? 
(c) What will be the formula of the compound between A and C?

An element X of atomic number 12 combines with an element Y of atomic number 17 to form a compound XY₂. State the nature of chemical bond in XY₂ and show how the electron configurations of X and Y change in the formation of this compound.

The electronic configurations of three elements A, B and C are as follows: 

$$\begin{gathered} \mathrm{A} 2,8,1 \\ \mathrm{B} 2,8,7 \\ \mathrm{C} 2,4 \end{gathered}$$
(a) Which of these elements is a metal? 
(b) Which of these elements are non-metals? 
(c) Which two elements will combine to form an ionic bond? 
(d) Which two elements will combine to form a covalent bond? 
(e) Which element will form an anion of valency 1?

The atomic number of an element X is 12.

(a) What must an atom of X do to attain the nearest inert gas electron configuration?
(b) Which inert gas is nearest to X?

The atomic number of an element Y is 16.

(a) What must an atom of Y do to achieve the nearest inert gas electron arrangement?
(b) Which inert gas is nearest to Y?

You can buy solid air-fresheners in shops. Do you think these substance are ionic or covalent? why?

Give the formulae of the chlorides of the elements X and Y having atomic numbers of 3 and 6 respectively. Will the properties of two chlorides be similar or different? Explain your answer.