According to Mendeleev’s Periodic Table, which elements' properties matched up remarkably well with eka-silicon?
Germanium
Option 4 is correct. Mendeleev predicted the existence of eka-silicon, which was later identified as Germanium due to its similar properties.
The correct order of decreasing electron gain enthalpy with negative sign for chalcogens is - Identify
Modern periodic table has:
‘Triclosan’, considered harmful when exposed to high levels for a long time, is most likely present in which of the following?
____________ is also known as Quick lime.