B. carbon-13 is not an allotrope of Carbon.
Allotropes<span> are elements on the periodic table that have more than one crystalline form. </span>Isotopes<span> are atoms of the same element with the same atomic number but have a different mass number.
C-13 is an isotope of carbon, not an allotrope.</span>
Answer:
ITS FALSE electricity doesn't travel through wood same with cement!
Answer: B. Allow light to pass through. :)
To make sure no cracks are in the crucible and also to remove any moisture present in the crucible by the process of heating.
