in this also is not given and in tb is also not given

  an element:

• consists of only one kind of atom,
• cannot be broken down into a simpler type of matter by either physical or chemical means, and
• can exist as either atoms (e.g. argon) or molecules (e.g., nitrogen).

•  a compound:

  • consists of atoms of two or more different elements bound together,
  • can be broken down into a simpler type of matter (elements) by chemical means (but not by physical means),
  • has properties that are different from its component elements, and
  • always contains the same ratio of its component atoms.

  • a mixture:

    • consists of two or more different elements and/or compounds physically intermingled,
    • can be separated into its components by physical means, and
    • often retains many of the properties of its components. ....................

thnx