Question

Q.1 Give one example each of molecule of element & molecule of compound.
Q.2 How does an atom differ from molecule ?
Q.3 Name a triatomic gas.
Q.4 Name the element represented by Hg , Pb, Au.
Q.5 What is the difference between an atom of hydrogen and a molecule of hydrogen?

Answer 1

Answer:

1: molecule of atom: O2

molecule of compound:H2O

2:Atom is asingle element made of electrons protons and neutrons.

3:Molecule is group of atoms.

Triatomic gas:O3(ozone gas)

4:Hg-mercury

Pb-lead

Au-gold

5:Atom of hydrogen is single element i.e. H

molecule of hydrogen is group of H atoms i.e.H2