Grade Gorilla Logo Small

Chemistry µGCSE:

Bonding

10 quick questions - for GCSE and iGCSE

home

 


10 minutes maximum! (can you do it in 5?)

 
1. Ionic bonding involves the ….
  • A.   sharing of electrons between metal atoms
  • B.   sharing of electrons between non-metal atoms
  • C.   transfer of electrons from metal to non-metal atoms
  • D.   transfer of electrons from non-metal to metal atoms
2. Covalent bonding involves ….
  • A.   sharing of electrons between metal atoms
  • B.   sharing of electrons between non-metal atoms
  • C.   transfer of electrons from metal to non-metal atoms
  • D.   transfer of electrons from non-metal to metal atoms

Q3+4:   Sodium burns in oxygen to form sodium oxide:

Burning sodium

 
3. In this reaction the sodium atom …..
  • A.    loses one electron and forms a positive ion with a 1+ charge
  • B.    loses one electron and forms a negative ion with a 1- charge
  • C.    gains one electron and forms a positive ion with a 1+ charge
  • D.    gains one electron and forms a negative ion with  a 1- charge
4. In this reaction the oxygen atom ……
  • A.   gains one electron
  • B.   loses one electron
  • C.   gains two electrons
  • D.   loses two electrons

 

5. Hydrogen and chlorine atoms combine to form hydrogen chloride gas. In this reaction the …

  • A.   hydrogen atom loses electrons and chlorine atom gains electrons
  • B.   chlorine atom loses electrons and hydrogen atom gains electrons
  • C.   chlorine atom shares one pair of electrons with the hydrogen atom
  • D.   chlorine atom shares two pairs of electrons with the hydrogen atom

6. Diagrams of magnesium and fluorine atoms are shown below:

Dot and cross diagram, magnesium and fluorine

Select the dot and cross diagram which correctly represents the bond formed between magnesium and fluorine (outer shells only are shown).

 
Magnesium Fluoride dot and cross diagram

 

7. Hydrogen reacts with oxygen forming water. Select the dot and cross diagram which correctly represents the bonding in water (outer shells only):

Water dot and cross diagram

 

8. When magnesium reacts with sulfur to form magnesium sulfide the electronic configuration of  …

  • A.   magnesium changes from 2,8,2 to 2,8 and an Mg+ ion is formed
  • B.   magnesium changes from 2,8,2 to 2,8,1 and an Mg2+ ion is formed
  • C.   sulfur changes from 2,8,6 to 2,8,7 and an S- ion is
  • D.   sulfur changes from 2,8,6 to 2,8,8 and an S2- ion forms
9. The two atoms in a molecule of nitrogen gas, N2, bond together by ….
  • A. transferring three electrons from one nitrogen atom to the other
  • B. sharing three pairs of electrons
  • C. sharing two pairs of electrons
  • D. sharing one pair of electrons
10. The dot and cross diagram which represents the bonding in a molecules of carbon dioxide is:

Carbon dioxide dot and cross diagram