physical science

we have a whole list and I am confused and can someone help me with the first 2 as a reference to use.

substance O
substance O2
**these are both separate lines**

name =
under the rest we check appropriate box

  1. 👍
  2. 👎
  3. 👁
  4. ℹ️
  5. 🚩
  1. O is an element, symbol, (single) atom
    O2 is a compound, formula and molecule

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩

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