Ans: Atomic mass unit (u) or Unified mass. Q4. Write the chemical formula of Sodium Carbonate. Ans: Na2CO3cap N a sub 2 cap C cap O sub 3 Short Answer Questions (2-3 Marks)
Ans: The number of atoms constituting a molecule is known as its atomicity (e.g., Oxygen is diatomic ( O2cap O sub 2
Atoms are indivisible particles, which cannot be created or destroyed in a chemical reaction. Ans: Atomic mass unit (u) or Unified mass
The relative number and kinds of atoms are constant in a given compound.
Ans: Number of atoms = Number of atoms = Number of atoms = Why Practice Extra Questions? Ans: Na2CO3cap N a sub 2 cap C
Ans: Antoine Lavoisier.
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Ans: Given mass ( ) = 52gMolar mass of He ( ) = 4gNumber of moles (