Which among the following were not discovered by the time , Mendeleev published his periodic table?

Related MCQs

• Ekaboron was an element predicted by Mendeleev and he leaved a space for it in his Periodic Table. Later Ekaboron was identified with _____?
• Which among the following does not come under carbon Group of Periodic Table?
• Which among the following first increases than decreases in a Period of a periodic table?
• Which of the following is / are correct statements with respect to Copper (Cu), Silver (Ag) and Gold (Au)? 1. All of them are can be found naturally in their elemental state 2. All of them belong to same group in the periodic table Select the correct option from the codes given below:
• F block elements in the periodic table which are commonly called Lanthanides have the following atomic numbers:
• What is the number of synthetic elements in periodic Table?
• What is the number of naturally occurring Halogens in the periodic table?
• The hormonal activities of which of the following substances were discovered while studying ―foolish seedling‖ disease in rice?
• Who among the following scientists had discovered Radium?
• Apart from sugarcane (most commonly Saccharum officinarum) which among the following plants is widely known in the world as a commercial source of table sugar ?