Available Answers

1. 1.

   An element/compound/mixture is a pure substance made up of - one kind of atoms which cannot be broken down into simpler substances.

2. 2.

   An element/compound/mixture is a pure substance made up of - two or more kinds of atoms chemically combined in a fixed proportion.

3. 3.

   An element/compound/mixture is a impure substance made up of - two or more kinds of atoms or compounds, mechanically mixed in any proportion.

4. 4.

   Name the radical with the symbol SO₃^2-

5. 5.

   Name the radical with the symbol SO₄^2-

6. 6.

   Name the radical with the symbol OH^1-