Your SlideShare is downloading. ×
Structure & essay Questions (chemical bond)
Upcoming SlideShare
Loading in...5

Thanks for flagging this SlideShare!

Oops! An error has occurred.

Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Structure & essay Questions (chemical bond)


Published on

Published in: Education

  • Be the first to comment

No Downloads
Total Views
On Slideshare
From Embeds
Number of Embeds
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

No notes for slide


  • 1. STRUCTURE QUESTIONPROPERTIES OF IONIC AND COVALENTElement P Q RProton number 6 8 11 Table 1 1 Table 1 shows the proton numbers of three elements P,Q and R. (a) Write the electron configuration for the ions of elements P,Q and R? ______________________________________________________ ______________________________________________________ (3 marks) (b) i. Draw the electronics arrangement for the compounds formed from the elements of P and Q. (2 marks) ii.What is the bond produced from the formation of the compounds as in s (b)(i) ____________________________________________________ (1 marks) (c) i.Draw the electronic arrangement for the compound formed from the elements Q and R. (2 marks) ii.What is the bond produced from the formation of the compound of (c)i? _______________________________________________________ (d) State three differences in the properties between the compounds formed as in the answers of (b)i and (c) i. 1. ____________________________________________________ 2. ____________________________________________________ 3. ____________________________________________________
  • 2. JAWAPAN1 (a) Element P : 2.8 Element Q : 2.8 Element R : 2.8 (b) i. ii. Covalent bond (c) i. ii. Ionic bond(d) Compound PQ2 Compound R2QMelting & boiling point Low HighVotality High LowConductivity of electricity Does not conduct Can conduct in the molten state
  • 3. ESSAY QUESTION1 Elements Group Period W 1 3 Y 14 2 Z 17 3 Table 2 (a) With the help of an electron arrangement diagram, explain how two elements from Table 2 can combine to form (i) An ionic compound and (ii) A covalent compound (14 marks) (b) State the differences between an ionic compound and a covalent compound. (6 marks)JAWAPAN 1 (a) (i) - Two elements that form an ionic compound are W and Z. 2 - Electronic configuration of atom W is 2.8.1 and electronic configuration of atom Z is 2.8.7 2 - To achieve the stable octet in the electron configuration of a noble gas. 1 - An atom W release one electron to form a W+ ion. 1 - An atom Z accepts one electron to form a Z- ion. 1 - The positive ions and negative ions formed are attracted by the strong electrostatic force of attraction. 1 (ii) - Two elements that form covalent compounds are Y and Z 2 - Electronic configuration of atom Y is 2.4 and Z is 2.8.7 2 - One atom Y contributes four electrons to be shared with four atoms of Z. 1 - Four pair of shared electrons
  • 4. form four single covalent bonds 1(b) Three differences between an ionic compound and covalent compound - An ionic compound has high boiling and melting point whereas a covalent compound has low melting and boiling point. 2 - An ionic compound is soluble in water but is insoluble in organic solvents, whereas a covalent compound is soluble in organic solvents but is insoluble in water. 2 - An ionic compound conducts electricity in the liquid state and in aqueous solution whereas a covalent compound does not conduct electricity in any state. 2