The correct answer is (b) 1869.
Dmitri Mendeleev, a Russian chemist, invented the periodic table in 1869.
He arranged the 63 known elements based on their atomic weights and properties.
Mendeleev's periodic table left gaps for elements yet to be discovered, predicting their properties with remarkable accuracy.
English
80 Questions
160 Marks
60 Mins English English80 Questions160 Marks60 Mins English English20 Questions40 Marks25 Mins EnglishIn ancient India, saltpetre was used for fireworks; it is actually:
Which of the following statements regarding ionic compounds is INCORRECT?
Which of the following is an allotropic form of carbon?
According to Newlands law of octaves, which of the following elements have same properties?
Which of the following is the correct name of a carbon compound with three-carbon chains and a ketone group?
The Law of Octaves' was proposed by:
Which one of the following metals is the most abundant in the Earth’s crust?
Suggested Test Series
Suggested Test Series
In ancient India, saltpetre was used for fireworks; it is actually:
Which of the following statements regarding ionic compounds is INCORRECT?
Which of the following is an allotropic form of carbon?
According to Newlands law of octaves, which of the following elements have same properties?
Which of the following is the correct name of a carbon compound with three-carbon chains and a ketone group?
The Law of Octaves' was proposed by:
Which one of the following metals is the most abundant in the Earth’s crust?
