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

Mass No. 27 is for the element ______.

Electrons revolve around the nucleus in definite open shells.

K and L shells can accommodate a maximum of 2 and 8 electrons respectively.

In a neutral atom number of protons is equal to the number of neutrons.

If an atom has 6 electrons in its outermost shell, it is inert.

Match the following:

Match the following:

If element M has mass number 24 and atomic number 12, how many neutrons does its atom contain?

What are the letters A, Z, and X stand for?

What is the relation between mass number & atomic number?

Compare the charge and mass of protons and electrons.

Ca²⁺ has completely filled outer shell. Justify your answer.

Define ionisation.

Correct the wrong statement given below:

Nitric Acid is a constituent of baking powder.

Correct the wrong statement given below:

Ca(OH)₂ is a triacidic base.

Describe the classification of bases based on their acidity.

Paracetamol is a ______.

What are antipyretics?

The skeletal framework of the phylum Porifera is made up of ______.

A true body cavity is located within ______.