EASY
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What is the maximum number of electrons that the outermost shell can have?

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Important Questions on Chemistry

MEDIUM
Eka–Aluminum was named as __________ in the modern periodic table? 
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Hemoglobin in humans has the highest affinity for which of the following gases?
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______ is a process in which impure water is boiled, and the steam is collected and condensed in a separate container, leaving many of the solid contaminants behind.

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Which group of modern periodic table consists of elements with 2, 8, 6 electronic configuration? 
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In modern periodic table, zig-zag line separate _____:
MEDIUM
Which solution is isotonic with 6% w/v aqueous solution of urea? [Molar mass of Urea=60 gm. mol-1 ]
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For the third period of the periodic table, the shells maybe?

EASY
Who discovered the proton, one of the fundamental particles of an atom?
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Which of the following metals is found in free state in nature?
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Atomic mass of nitrogen is 14 u. Which of the following sample contain 6.022×1023 nitrogen atoms?
MEDIUM
The outer shell of which group of elements is complete in the modern periodic table?
EASY
What conclusion can be drawn from C612 about carbon atom? 
MEDIUM
Which is the first element to be artificially produced?