2 Shape of molecules

 

/
~
~
~
/
Show Learning Materials

2.2.2 bonding and structure Page 4

Oxford Textbook Pages : 70 - 73

CGP Revision Guide Pages : 46 - 47

/
/
/
/

Show Specification Ref : 2.2.2g, 2.2.2h

/
/
/
/
Show past exam questions

Question 1 / 5

AQA Jan 2010 Paper 1 Q6 pmt areas outside the box will not be scanned for marking a molecule of clf reacts with a molecule of asf as shown in the following equation clf asf clf asf ion ion ion include any lone pairs of electrons use your understanding of electron pair repulsion to draw the shape of the asf molecule and the shape of the clf name the shape made by the atoms in the asf molecule and in the clf predict the bond angle in the clf marks extra space end of questions wmp jan chem
Show answer

Question 2 / 5

AQA Jan 2011 Paper 1 Q1 section a answer all questions in the spaces provided do not write outside the box a water can be found as ice water and steam the following diagram shows the arrangement of some of the water molecules in a crystal of ice with reference to the structure shown above give one reason why ice is less dense than water mark b water and methane have similar relative molecular masses and both contain the element hydrogen the table below gives some information about water and methane mr melting point k h o ch b i state the strongest type of intermolecular force holding the water molecules together in the ice crystal mark b ii state the strongest type of intermolecular force in methane mark wmp jan chem do not write outside the box b iii give one reason why the melting point of ice is higher than the melting point of methane mark c a molecule of h o can react with an h ion to form an h o ion c i draw and name the shape of the h o ion include any lone pairs of electrons shape of the h o ion name of shape marks c ii suggest a value for the bond angle in the h o ion mark c iii identify one molecule with the same number of atoms the same number of electrons and the same shape as the h o ion mark d water can also form the hydroxide ion state the number of lone pairs of electrons in the hydroxide ion mark turn over wmp jan chem
Show answer

Question 3 / 5

AQA Jan 2013 Paper 1 Q6 do not write outside the box a chlorine can form molecules and ions that contain only chlorine or that contain chlorine combined with another element use your understanding of the electron pair repulsion theory to draw the shape of the ascl molecule and the shape of the cl include any lone pairs of electrons that influence the shape ion name the shape made by the atoms in the ascl molecule and in the cl ion marks extra space b explain why the ascl ion has a bond angle of marks extra space end of questions wmp jan chem
Show answer

Question 4 / 5

AQA Jun 2011 Paper 1 Q3 do not write outside the box fluorine and iodine are elements in group of the periodic table a explain why iodine has a higher melting point than fluorine marks extra space b i draw the shape of the nhf molecule and the shape of the bf molecule include any lone pairs of electrons that influence the shape in each case name the shape shape of nhf shape of bf name of shape of nhf name of shape of bf marks b ii suggest a value for the f n f bond angle in nhf mark c state the strongest type of intermolecular force in a sample of nhf mark wmp jun chem do not write outside the box d a molecule of nhf reacts with a molecule of bf as shown in the following equation nhf bf f hnbf state the type of bond formed between the n atom and the b atom in f hnbf explain how this bond is formed name of type of bond how bond is formed marks turn over for the next question turn over wmp jun chem do not write outside the box there are several types of crystal structure and bonding shown by elements and compounds a i name the type of bonding in the element sodium mark a ii use your knowledge of structure and bonding to draw a diagram that shows how the particles are arranged in a crystal of sodium you should identify the particles and show a minimum of six particles in a two dimensional diagram b sodium reacts with chlorine to form sodium chloride b i name the type of bonding in sodium chloride mark b ii explain why the melting point of sodium chloride is high marks marks extra space wmp jun chem
Show answer

Question 5 / 5

AQA Jun 2013 Paper 1 Q5 do not write outside the box aluminium and thallium are elements in group of the periodic table both elements form compounds and ions containing chlorine and bromine a write an equation for the formation of aluminium chloride from its elements mark b an aluminium chloride molecule reacts with a chloride ion to form the alcl ion name the type of bond formed in this reaction explain how this type of bond is formed in the alcl ion type of bond explanation marks c aluminium chloride has a relative molecular mass of in the gas phase deduce the formula of the aluminium compound that has a relative molecular mass of mark d deduce the name or formula of a compound that has the same number of atoms the same number of electrons and the same shape as the alcl ion mark e draw and name the shape of the tlbr ion shape of the tlbr ion name of shape marks wmp jun chem f i draw the shape of the tlcl ion do not write outside the box mark f ii explain why the tlcl ion has the shape that you have drawn in part f i mark g which one of the first second or third ionisations of thallium produces an ion with the electron configuration xe d s tick one box first second third mark turn over wmp jun chem do not write outside the box the elements in period show periodic trends a identify the period element from carbon to fluorine that has the largest atomic radius explain your answer element explanation marks b state the general trend in first ionisation energies from carbon to neon deduce the element that deviates from this trend and explain why this element deviates from the trend trend element that deviates explanation marks c write an equation including state symbols for the reaction that occurs when the first ionisation energy of carbon is measured mark wmp jun chem
Show answer
/
/
/
/
/
/