Chemistry 2012 A level MCQ answers and paper discussion Old syllabus and new syllabus

Old syllabus Mcq

1. The number of elements in the first four periods of the peiodic table is 36

 in first period 2

    second       8

    third           8

    fourth         18 

 

 add these values and you will get the answer       

2.           

New syllabus mcwq

1.