Which is known as the smallest structural unit of matter?
Particle
Atom
Molecule
Neutron
Give an example for an element?
Oxygen Molecule
Oxygen atom
Oxygen ion
Oxygen particle
A substance that consists of two or more different elements or compounds physically mixed together is known as?
Compound
Mixture
Matter
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
Write the atomic molecule from below?
H2O
Na2O3
NaCl
CaCl2
Valency of Oxygen in water molecule is?
2
3
1
4
Atom or groups of atoms that carry positive or negative charges are known as?
Chemical formula
Radicals
Irons
Valency of nitrogen in ammonia (NH3) is?
Give an example for mono atomic molecule?
O2
N2O3
NH3
Write the chemical formula of common salt is?
HCL
