MATTER AROUND US

  
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1. The graphite refill used in pencil is made up of element called .

2. The smallest unit of an element that exhibits the properties of the element is called as .

3. is a substance that is made up of three oxygen atoms chemically combined.

4. The most abundant type of atom in the universe is the atom.

5. A is made up of two or more atoms chemically combined.

6. A molecule which contains only one atom is called molecule.

7. A molecule which contains two atoms is called molecule.

8.A molecule which contains three atoms is called molecule.