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10th CBSE
IMPORTANT
Earn 100

Helium is an unreactive gas and neon is a gas of extremely low reactivity. What, if anything, do their atoms have in common?

Important Questions on Periodic Classification Of Elements

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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 5 - Periodic Classification Of Elements>NCERT Section>Q 12
In the modern periodic table, which are the metals among the first ten elements?
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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 5 - Periodic Classification Of Elements>NCERT Section>Q 13

By considering their position in the periodic table, which one of the following elements would you expect to have maximum metallic characteristics.

Ga, Ge, As, Se, Be

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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 5 - Periodic Classification Of Elements>NCERT Section>Q 14
Which of the following statements is not a correct statement about the trends when going from left to right across the period of the periodic table?
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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 5 - Periodic Classification Of Elements>NCERT Section>Q 15
Element X forms a chloride with the formula XCl2 which is a solid with high melting point. X would most likely be in the same group pf periodic table as:
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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 5 - Periodic Classification Of Elements>NCERT Section>Q 16
Which element has two shells, both of which are completely filled with two electrons?
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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 5 - Periodic Classification Of Elements>NCERT Section>Q 16
Which element has the electronic configuration 2, 8, 2.
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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 5 - Periodic Classification Of Elements>NCERT Section>Q 16
Which element has a total of three shells, with four electrons in its valence shell?
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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 5 - Periodic Classification Of Elements>NCERT Section>Q 16
Which element has a total of two shells, with three electrons in its valence shell?