Question

Which of the following statement is correct
A. quartz contain SiO2 units
B. carbon has 3 isotopes
C. Titanium is called little silver
D. petrol contain hydrocarbons

Answer 1

ans is 2
There are three naturally occurring isotopes of carbon: 12, 13, and 14. C and 13C are stable, occurring in a natural proportion of approximately 99:1.
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