An unglazed piece of porcelain, used to test the characteristic streak of minerals by rubbing the mineral across the tile. Streak plates have a hardness of about 6.5 on the Mohs scale and cannot be used for testing harder minerals.
True or False. The answer to the question
It has to lose electrons to become positively charged, so it can attract a negatively charged oxygen ion.
<span>When a supersaturated solution is disturbed, for example by adding further crystals of ammonium nitrate, crystals will form from the solute in the supersaturated solution.</span>