Question

What are Non-metals and noble gases?
What is an atom?

Answer 1

Answer:

What are Non-metals and noble gases?

Ans: The 6 elements classified as "Noble Gases" are located in Group 18 of the Periodic Table. Because the outermost electron shell of atoms of these gases is full, they do not react chemically with other substances except under certain special conditions.

What is an atom?

Ans: An atom is the smallest unit of ordinary matter that forms a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are extremely small, typically around 100 picometers across

Answer 2

The modern periodic table consists of elements arranged according to their increasing atomic numbers.’ With reference to elements with atomic number 1 to 20 in the periodic table - differentiate them into - metallic elements, metalloids, non-metals & noble gases.