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The electronic configuration of some elements is given in the table below.

ElementElectronic configuration
P2, 8, 8
Q2, 8, 8, 1
R2, 6
S2, 5
T2, 8, 2
U2, 8, 7

(a) Identify any two pairs of elements that will react to form compounds by a transfer of electrons. 

(b) Write the molecular formula of the compounds formed by the pairs of elements identified in (a).

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(a) Two correct pairs of elements identified such as: - 

Q and R  

Q and U  

T and R 

T and U 

(b) The formula for two compounds such as: Q2R, QU, TR and TU2