How many elements are discovered until now?

Important Questions on Modern Periodic Table

EASY

11th Maharashtra Board

IMPORTANT

Chemistry>Chapter 7 - Modern Periodic Table>Can you recall?

How many horizontal rows and vertical columns are present in modern periodic table?

EASY

11th Maharashtra Board

IMPORTANT

Chemistry>Chapter 7 - Modern Periodic Table>Just think

How many days pass between two successive full moon nights?

EASY

11th Maharashtra Board

IMPORTANT

Chemistry>Chapter 7 - Modern Periodic Table>Just think

What type of motion does a pendulum exhibit?

EASY

11th Maharashtra Board

IMPORTANT

Chemistry>Chapter 7 - Modern Periodic Table>Just think

Give some other examples of periodic events.

EASY

11th Maharashtra Board

IMPORTANT

Chemistry>Chapter 7 - Modern Periodic Table>Can you recall?

What does the principal quantum number $\text{'}\mathrm{n}\text{'}$ and azimuthal quantum number $\text{'}\mathrm{l}\text{'}$ of an electron belonging to an atom represent?

EASY

11th Maharashtra Board

IMPORTANT

Chemistry>Chapter 7 - Modern Periodic Table>Can you recall?

Which principle is followed in the distribution of electrons in an atom?

EASY

11th Maharashtra Board

IMPORTANT

Chemistry>Chapter 7 - Modern Periodic Table>Exercises>Q 1

Explain why the element $\mathrm{Li}, \mathrm{B}, \mathrm{C}, \mathrm{Be}$ and $\mathrm{N}$ have the electronegativities $1.0, 2.0, 2.5, 1.5$and $3.0$ respectively on the Pauling scale?

EASY

11th Maharashtra Board

IMPORTANT

Chemistry>Chapter 7 - Modern Periodic Table>Exercises>Q 1

Explain why- The atomic radii of $\mathrm{Cl}, \mathrm{I}$ and $\mathrm{Br}$ are $99, 133$ and $114$$\mathrm{pm}$, respectively?