Answer available
Class 10 · Chemistry · Periodic Properties and Variations of Properties
State the modern periodic law.
2 marksEasyShort answer
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17 questions
- Answer available
Class 10 · Chemistry · Periodic Properties and Variations of Properties
An element X has atomic number 12. Write its electronic configuration, its group and the formula of its chloride.
3 marksMediumNumerical
- Answer available
Class 10 · Chemistry · Periodic Properties and Variations of Properties
The element with the highest electronegativity is:
1 markMediumMCQ
- Answer available
Class 10 · Chemistry · Periodic Properties and Variations of Properties
Why is the ionisation potential of magnesium greater than that of sodium?
2 marksMediumShort answer
- Answer available
Class 10 · Chemistry · Periodic Properties and Variations of Properties
An element with the electronic configuration 2, 8, 1 belongs to:
1 markMediumMCQ
- Answer available
Class 10 · Chemistry · Periodic Properties and Variations of Properties
Why do all the elements of a group show similar chemical properties?
2 marksMediumShort answer
- Answer available
Class 10 · Chemistry · Periodic Properties and Variations of Properties
Across a period from left to right, the atomic size:
1 markEasyMCQ
- Answer available
Class 10 · Chemistry · Periodic Properties and Variations of Properties
How does metallic character vary across a period and down a group, and why?
3 marksMediumShort answer
- Answer available
Class 10 · Chemistry · Periodic Properties and Variations of Properties
Why are the noble gases placed in a separate group and why is their ionisation potential very high?
2 marksMediumShort answer
- Answer available
Class 10 · Chemistry · Periodic Properties and Variations of Properties
Define ionisation potential and state how it varies across a period.
3 marksMediumShort answer
- Answer available
Class 10 · Chemistry · Periodic Properties and Variations of Properties
Elements A, B and C have atomic numbers 11, 17 and 18. Identify which is a metal, which a non-metal and which is chemically inert, and give the formula of the compound formed between A and B.
3 marksMediumStructured
- Answer available
Class 10 · Chemistry · Periodic Properties and Variations of Properties
An element has the electronic configuration 2, 8, 7. State its group, its period and whether it is a metal or a non-metal.
3 marksMediumNumerical
- Answer available
Class 10 · Chemistry · Periodic Properties and Variations of Properties
How does atomic size vary across a period and down a group? Give the reason in each case.
3 marksMediumShort answer
- Answer available
Class 10 · Chemistry · Periodic Properties and Variations of Properties
Define electron affinity and electronegativity, and state how each varies down a group.
3 marksMediumShort answer
- Answer available
Class 10 · Chemistry · Periodic Properties and Variations of Properties
Arrange Li, Na and K in increasing order of ionisation potential and give the reason.
2 marksMediumShort answer
- Answer available
Class 10 · Chemistry · Periodic Properties and Variations of Properties
On moving from left to right across a period in the modern periodic table, the atomic size generally:
1 markEasyMCQ
- Answer available
Class 10 · Chemistry · Periodic Properties and Variations of Properties
State two reasons why ionisation energy increases on moving across a period from left to right.
2 marksEasyShort answer