Write the chemical formula of common salt is?
NaCl
CaCl2
NH3
HCL
Which is known as the smallest structural unit of matter?
Particle
Atom
Molecule
Neutron
Symbol of Mercury?
Ag
Me
Hg
Au
Elements present in water are?
Hydrogen
Oxygen
Both Hydrogen and Oxygen
Only Hydrogen
Atom or groups of atoms that carry positive or negative charges are known as?
Chemical formula
Radicals
Irons
Which is known as the building block of a matter?
Electron
Proton
Give an example for mono atomic molecule?
H2O
O2
N2O3
Symbol of Calcium is represents?
CA
Ca
C
Cal
Give an example for an element?
Oxygen Molecule
Oxygen atom
Oxygen ion
Oxygen particle
Valency of Oxygen in water molecule is?
2
3
1
4
