Symbol of Calcium is represents?
CA
Ca
C
Cal
Write the chemical formula of common salt is?
NaCl
CaCl2
NH3
HCL
Hydrogen radical is represented by the formula?
H2
H
OH
H2O
An element is a substance?
With only one kind of atom
Which can be broken down into simpler substance
With two or more elements
Building block of a substance
Which is known as the smallest structural unit of matter?
Particle
Atom
Molecule
Neutron
Atom or groups of atoms that carry positive or negative charges are known as?
Chemical formula
Radicals
Irons
Write the atomic molecule from below?
Na2O3
Give an example for mono atomic molecule?
O2
N2O3
A substance that consists of two or more different elements or compounds physically mixed together is known as?
Compound
Mixture
Matter
Elements present in water are?
Hydrogen
Oxygen
Both Hydrogen and Oxygen
Only Hydrogen
