Except Helium, all noble gases have how many electrons in the outermost shell?
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What are the organs similar in basic structure/shape, modified to perform different functions called?
During the day which process is the major driving force in the movement of water in the xylem?
Stagflation exists when _____
Which of the following is NOT a property of acids?
In the modern periodic table, which of the two periods contain 8 elements each?
Jama Masjid of Delhi was built in which century?
Jahangir (1605–1627 AD) was the ruler of which dynasty?