SSLC (English Medium) इयत्ता ९ - Tamil Nadu Board of Secondary Education Question Bank Solutions

Assertion: As the amplitude of sound increases, the loudness of sound decreases.
Reason: The loudness of sound depends on the amplitude of the wave.

Name the distinguishing factors of sound.

Define: 

Intensity

Define:

Timbre

What are the factors that the intensity of Sound depends upon?

Water is a ______.

When two or more elements combine together they form ______.

The elements that follow lanthanum are called ______.

Write the advantages of the Modern Periodic Table.

Write the differences between mixture and compounds.

Every atom has an equal number of protons and electrons. The nature of the atom is ______.

The No. of electrons in the outermost shell of the atom of an inert gas ______.

The Atomic number of an element is 20. It has ______ valence electrons. 

A ______ number describes a specific aspect of an electron.

When an atom gives electrons from its outermost shell, it becomes ______ charged.

The elementary particles such as protons and neutrons are collectively called ______.

______ = No. of protons = No. of the electrons.

 ‘A’ is denoted by ______.

‘Z’ is denoted by  ______.

Mass No =______ + No. of Neutrons.