Answer:
I think it's streak and cleavage.
Explanation:
I'm not the smartest so sorry if it's wrong.
Answer is convalent . When electrons are shared, this is a convalent bond. Now if the electrons are transferred and not shared, this is an ionic bond. Ionic bonds are stronger than convalent bonds.
Answer : The number '3' is a moles.
Explanation :
The given chemical formula is,
As we know that,
For 1 mole of , there are 1 mole of nitrogen and 2 moles of oxygen.
For 3 mole of , there are 3 moles of nitrogen and 6 moles of oxygen.
So, from this we conclude that the number '3' present before represent the number of moles.
Hence, the number '3' is a moles.