Which of the following classifications is based on atomic numbers?
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In the Modern Periodic Table, a zig-zag line separates
If the electronic configuration of elements A and B are 1S2, 2S2 2P6, 3S1 and 1S2, 2S2 2P6, 3S2 3P4 respectively, then the formula of the compound formed by the combination of these elements will be:
Which of the following metals does NOT react with Oxygen even at a high temperature?
The number of electrons that can be accommodated in the M shell is
Galvanization a process to prevent rusting involves use of ___ coating to steel or iron.
Least distance of distinct vision for normal eye is
One should use porcelain and not metal containers in a microwave oven because..