chemical formula of elements

The number of atoms present in a single molecule of an element is known as -------------

• atoms

• molecules

• atomicity

• none

------------- is the smallest particle of an element

• Molecule

• Atom

• Neutron

• Proton

What is the name of negatively charged particles?

• Protons

• Neutrons

• Electrons

• None

Atom contains core called --------------

• Protons

• Neutrons

• Electrons

• Nucleus

Name the symbol of gold

• Na

• K

• Si

• Au

----------- are the fundamental building blocks of chemistry

• Equations

• Atoms

• Symbols

• Chemical formula

Which one of the following is the formula of common salt?

• Sodium Chloride

• 
  

  $H_2O$

• $N_2O$

• Iron Sulphide