As Periods is a quite important topic, so given below is a free online quiz about it which will help you in checking and also improving your knowledge related to this topic. Our tests include all the important questions and answers that have pretty high amount of changes for being asked in the actual exam which makes them the best source of preparation available for free.
Inorganic Chemistry Periods Online Quiz Test MCQs
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9th elements ki properties 1st s match hoti hn r 8th ki 4th s…..
pls explain
9th element ki properties 1st s match hoti hn.8th ki 4th s….
good experience
93% not bad.
Every eight element repeats properties of element. 4th kyun??? 1 hona chaiye.!!!
Yes I also confused on that point
yes i agree