What is the chemical symbol for zinc ? ?

Zn

If you're in chemistry class its important to have a periodic table handy with you, you can find one on google.  It will help you answer similar questions to these much easier.

answer; i believe the correct answer is (c) /// is a homogeneous mixture of gaseous substance nitrogen,oxygen and smaller amounts of other substancesmixtures can be either ( homogeneous or heterogeneous)plz check first good luck

c (diamond),

sio2 (quartz)